Skip to main content
.NET Framework Class Library
Int32 Structure

Represents a 32-bit signed integer.

To browse the .NET Framework source code for this type, see the Reference Source.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)
Syntax
<[%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_0%]> _
<[%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_1%](True)> _
Public Structure Int32 _
	Implements [%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_2%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_3%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_4%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_5%](Of Integer),  _
	[%$TOPIC/td2s409d_en-us_VS_110_2_0_0_0_6%](Of Integer)
[[%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_0%]]
[[%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_1%](true)]
public struct Int32 : [%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_2%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_3%], 
	[%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_4%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_5%]<int>, [%$TOPIC/td2s409d_en-us_VS_110_2_0_1_0_6%]<int>
[[%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_0%]]
[[%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_1%](true)]
public value class Int32 : [%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_2%], 
	[%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_3%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_4%], [%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_5%]<int>, [%$TOPIC/td2s409d_en-us_VS_110_2_0_2_0_6%]<int>
[<[%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_0%]>]
[<[%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_1%]>]
[<[%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_2%](true)>]
type Int32 =  
    struct 
        interface [%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_3%] 
        interface [%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_4%] 
        interface [%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_5%] 
        interface [%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_6%]<int>
        interface [%$TOPIC/td2s409d_en-us_VS_110_2_0_3_0_7%]<int>
    end

The Int32 type exposes the following members.

Methods
  NameDescription
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps CompareTo(Int32)Compares this instance to a specified 32-bit signed integer and returns an indication of their relative values.
Public method Supported by the XNA Framework CompareTo(Object)Compares this instance to a specified object and returns an indication of their relative values.
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps Equals(Int32)Returns a value indicating whether this instance is equal to a specified Int32 value.
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps Equals(Object)Returns a value indicating whether this instance is equal to a specified object. (Overrides ValueTypeEquals(Object).)
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps GetHashCodeReturns the hash code for this instance. (Overrides ValueTypeGetHashCode.)
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps GetTypeGets the Type of the current instance. (Inherited from Object.)
Public method Supported by the XNA Framework GetTypeCodeReturns the TypeCode for value type Int32.
Public method Static member Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps Parse(String)Converts the string representation of a number to its 32-bit signed integer equivalent.
Public method Static member Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps Parse(String, NumberStyles)Converts the string representation of a number in a specified style to its 32-bit signed integer equivalent.
Public method Static member Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps Parse(String, IFormatProvider)Converts the string representation of a number in a specified culture-specific format to its 32-bit signed integer equivalent.
Public method Static member Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps Parse(String, NumberStyles, IFormatProvider)Converts the string representation of a number in a specified style and culture-specific format to its 32-bit signed integer equivalent.
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps ToStringConverts the numeric value of this instance to its equivalent string representation. (Overrides ValueTypeToString.)
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps ToString(IFormatProvider)Converts the numeric value of this instance to its equivalent string representation using the specified culture-specific format information.
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps ToString(String)Converts the numeric value of this instance to its equivalent string representation, using the specified format.
Public method Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps ToString(String, IFormatProvider)Converts the numeric value of this instance to its equivalent string representation using the specified format and culture-specific format information.
Public method Static member Supported by Portable Class Library Supported in .NET for Windows Store apps TryParse(String, Int32)Converts the string representation of a number to its 32-bit signed integer equivalent. A return value indicates whether the conversion succeeded.
Public method Static member Supported by Portable Class Library Supported in .NET for Windows Store apps TryParse(String, NumberStyles, IFormatProvider, Int32)Converts the string representation of a number in a specified style and culture-specific format to its 32-bit signed integer equivalent. A return value indicates whether the conversion succeeded.
Top
Fields
  NameDescription
Public field Static member Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps MaxValueRepresents the largest possible value of an Int32. This field is constant.
Public field Static member Supported by the XNA Framework Supported by Portable Class Library Supported in .NET for Windows Store apps MinValueRepresents the smallest possible value of Int32. This field is constant.
Top
Explicit Interface Implementations
  NameDescription
Explicit interface implemetation Private method Supported by Portable Class Library Supported in .NET for Windows Store apps IComparableCompareToCompares the current instance with another object of the same type and returns an integer that indicates whether the current instance precedes, follows, or occurs in the same position in the sort order as the other object.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToBooleanInfrastructure. For a description of this member, see IConvertibleToBoolean.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToByteInfrastructure. For a description of this member, see IConvertibleToByte.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToCharInfrastructure. For a description of this member, see IConvertibleToChar.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToDateTimeInfrastructure. This conversion is not supported. Attempting to use this method throws an InvalidCastException.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToDecimalInfrastructure. For a description of this member, see IConvertibleToDecimal.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToDoubleInfrastructure. For a description of this member, see IConvertibleToDouble.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToInt16Infrastructure. For a description of this member, see IConvertibleToInt16.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToInt32Infrastructure. For a description of this member, see IConvertibleToInt32.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToInt64Infrastructure. For a description of this member, see IConvertibleToInt64.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToSByteInfrastructure. For a description of this member, see IConvertibleToSByte.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToSingleInfrastructure. For a description of this member, see IConvertibleToSingle.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToTypeInfrastructure. For a description of this member, see IConvertibleToType.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToUInt16Infrastructure. For a description of this member, see IConvertibleToUInt16.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToUInt32Infrastructure. For a description of this member, see IConvertibleToUInt32.
Explicit interface implemetation Private method Supported by the XNA Framework IConvertibleToUInt64Infrastructure. For a description of this member, see IConvertibleToUInt64.
Top
Remarks
NoteNote

To view the .NET Framework source code for this type, see the Reference Source. You can browse through the source code online, download the reference for offline viewing, and step through the sources (including patches and updates) during debugging; see instructions.

Int32 is an immutable value type that represents signed integers with values that range from negative 2,147,483,648 (which is represented by the Int32MinValue constant) through positive 2,147,483,647 (which is represented by the Int32MaxValue constant. The .NET Framework also includes an unsigned 32-bit integer value type, UInt32, which represents values that range from 0 to 4,294,967,295.

Instantiating an Int32 Value

You can instantiate an Int32 value in several ways:

  • You can declare an Int32 variable and assign it a literal integer value that is within the range of the Int32 data type. The following example declares two Int32 variables and assigns them values in this way.

    Dim number1 As Integer = 64301
    Dim number2 As Integer = 25548612
    int number1 = 64301;
    int number2 = 25548612;
  • You can assign the value of an integer type whose range is a subset of the Int32 type. This is a widening conversion that does not require a cast operator in C# or a conversion method in Visual Basic.

    Dim value1 As SByte = 124
    Dim value2 As Int16 = 1618
    
    Dim number1 As Integer = value1
    Dim number2 As Integer = value2
    sbyte value1 = 124;
    short value2 = 1618;
    
    int number1 = value1;
    int number2 = value2;
  • You can assign the value of a numeric type whose range exceeds that of the Int32 type. This is a narrowing conversion, so it requires a cast operator in C# and a conversion method in Visual Basic if OptionStrict is on. If the numeric value is a Single, Double, or Decimal value that includes a fractional component, the handling of its fractional part depends on the compiler performing the conversion. The following example performs narrowing conversions to assign several numeric values to Int32 variables.

    Dim lNumber As Long = 163245617
    Try 
       Dim number1 As Integer = CInt(lNumber)
       Console.WriteLine(number1)
    Catch e As OverflowException
       Console.WriteLine("{0} is out of range of an Int32.", lNumber)
    End Try 
    
    Dim dbl2 As Double = 35901.997
    Try 
       Dim number2 As Integer = CInt(dbl2)
       Console.WriteLine(number2)
    Catch e As OverflowException
       Console.WriteLine("{0} is out of range of an Int32.", dbl2)
    End Try 
    
    Dim bigNumber As BigInteger = 132451
    Try 
       Dim number3 As Integer = CInt(bigNumber)
       Console.WriteLine(number3)
    Catch e As OverflowException
       Console.WriteLine("{0} is out of range of an Int32.", bigNumber)
    End Try     
    ' The example displays the following output: 
    '       163245617 
    '       35902 
    '       132451
    long lNumber = 163245617;
    try {
       int number1 = (int) lNumber;
       Console.WriteLine(number1);
    }
    catch (OverflowException) {
       Console.WriteLine("{0} is out of range of an Int32.", lNumber);
    }
    
    double dbl2 = 35901.997;
    try {
       int number2 = (int) dbl2;
       Console.WriteLine(number2);
    }   
    catch (OverflowException) {
       Console.WriteLine("{0} is out of range of an Int32.", dbl2);
    }
    
    BigInteger bigNumber = 132451;
    try {
       int number3 = (int) bigNumber;
       Console.WriteLine(number3);
    }
    catch (OverflowException) {
       Console.WriteLine("{0} is out of range of an Int32.", bigNumber);
    }    
    // The example displays the following output: 
    //       163245617 
    //       35902 
    //       132451
  • You can call a method of the Convert class to convert any supported type to an Int32 value. This is possible because Int32 supports the IConvertible interface. The following example illustrates the conversion of an array of Decimal values to Int32 values.

    Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
                                199.55d, 9214.16d, Decimal.MaxValue }
    Dim result As Integer 
    
    For Each value As Decimal In values
       Try
          result = Convert.ToInt32(value)
          Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                            value.GetType().Name, value, _
                            result.GetType().Name, result)
       Catch e As OverflowException
          Console.WriteLine("{0} is outside the range of the Int32 type.", _
                            value)
       End Try    
    Next                                   
    ' The example displays the following output: 
    '    -79228162514264337593543950335 is outside the range of the Int32 type. 
    '    Converted the Decimal value '-1034.23' to the Int32 value -1034. 
    '    Converted the Decimal value '-12' to the Int32 value -12. 
    '    Converted the Decimal value '0' to the Int32 value 0. 
    '    Converted the Decimal value '147' to the Int32 value 147. 
    '    Converted the Decimal value '199.55' to the Int32 value 200. 
    '    Converted the Decimal value '9214.16' to the Int32 value 9214. 
    '    79228162514264337593543950335 is outside the range of the Int32 type.
    decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
                        199.55m, 9214.16m, Decimal.MaxValue };
    int result;
    
    foreach (decimal value in values)
    {
       try {
          result = Convert.ToInt32(value);
          Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                            value.GetType().Name, value,
                            result.GetType().Name, result);
       }
       catch (OverflowException) {
          Console.WriteLine("{0} is outside the range of the Int32 type.",
                            value);
       }   
    }                                  
    // The example displays the following output: 
    //    -79228162514264337593543950335 is outside the range of the Int32 type. 
    //    Converted the Decimal value '-1034.23' to the Int32 value -1034. 
    //    Converted the Decimal value '-12' to the Int32 value -12. 
    //    Converted the Decimal value '0' to the Int32 value 0. 
    //    Converted the Decimal value '147' to the Int32 value 147. 
    //    Converted the Decimal value '199.55' to the Int32 value 200. 
    //    Converted the Decimal value '9214.16' to the Int32 value 9214. 
    //    79228162514264337593543950335 is outside the range of the Int32 type.
  • You can call the Parse or TryParse method to convert the string representation of an Int32 value to an Int32. The string can contain either decimal or hexadecimal digits. The following example illustrates the parse operation by using both a decimal and a hexadecimal string.

    Dim string1 As String = "244681" 
    Try 
       Dim number1 As Integer = Int32.Parse(string1)
       Console.WriteLine(number1)
    Catch e As OverflowException
       Console.WriteLine("'{0}' is out of range of a 32-bit integer.", string1)
    Catch e As FormatException
       Console.WriteLine("The format of '{0}' is invalid.", string1)
    End Try 
    
    Dim string2 As String = "F9A3C" 
    Try 
       Dim number2 As Integer = Int32.Parse(string2,
                                System.Globalization.NumberStyles.HexNumber)
       Console.WriteLine(number2)
    Catch e As OverflowException
       Console.WriteLine("'{0}' is out of range of a 32-bit integer.", string2)
    Catch e As FormatException
       Console.WriteLine("The format of '{0}' is invalid.", string2)
    End Try 
    ' The example displays the following output: 
    '       244681 
    '       1022524
    string string1 = "244681";
    try {
       int number1 = Int32.Parse(string1);
       Console.WriteLine(number1);
    }
    catch (OverflowException) {
       Console.WriteLine("'{0}' is out of range of a 32-bit integer.", string1);
    }
    catch (FormatException) {
       Console.WriteLine("The format of '{0}' is invalid.", string1);
    }
    
    string string2 = "F9A3C";
    try {
       int number2 = Int32.Parse(string2,
                                System.Globalization.NumberStyles.HexNumber);
       Console.WriteLine(number2);
    }
    catch (OverflowException) {
       Console.WriteLine("'{0}' is out of range of a 32-bit integer.", string2);
    }
    catch (FormatException) {
       Console.WriteLine("The format of '{0}' is invalid.", string2);
    }
    // The example displays the following output: 
    //       244681 
    //       1022524

Performing Operations on Int32 Values

The Int32 type supports standard mathematical operations such as addition, subtraction, division, multiplication, negation, and unary negation. Like the other integral types, the Int32 type also supports the bitwise AND, OR, XOR, left shift, and right shift operators.

You can use the standard numeric operators to compare two Int32 values, or you can call the CompareTo or Equals method.

You can also call the members of the Math class to perform a wide range of numeric operations, including getting the absolute value of a number, calculating the quotient and remainder from integral division, determining the maximum or minimum value of two integers, getting the sign of a number, and rounding a number.

Representing an Int32 as a String

The Int32 type provides full support for standard and custom numeric format strings. (For more information, see Formatting Types, Standard Numeric Format Strings, and Custom Numeric Format Strings.)

To format an Int32 value as an integral string with no leading zeros, you can call the parameterless ToString method. By using the "D" format specifier, you can also include a specified number of leading zeros in the string representation. By using the "N" format specifier, you can include group separators and specify the number of decimal digits to appear in the string representation of the number. By using the "X" format specifier, you can represent an Int32 value as a hexadecimal string. The following example formats the elements in an array of Int32 values in these four ways.

Dim numbers() As Integer = { -1403, 0, 169, 1483104 }
For Each number As Integer In numbers
   ' Display value using default formatting.
   Console.Write("{0,-8}  -->   ", number.ToString())
   ' Display value with 3 digits and leading zeros.
   Console.Write("{0,11:D3}", number) 
   ' Display value with 1 decimal digit.
   Console.Write("{0,13:N1}", number) 
   ' Display value as hexadecimal.
   Console.Write("{0,12:X2}", number) 
   ' Display value with eight hexadecimal digits.
   Console.WriteLine("{0,14:X8}", number)
Next    
' The example displays the following output: 
'    -1403     -->         -1403     -1,403.0    FFFFFA85      FFFFFA85 
'    0         -->           000          0.0          00      00000000 
'    169       -->           169        169.0          A9      000000A9 
'    1483104   -->       1483104  1,483,104.0      16A160      0016A160
int[] numbers = { -1403, 0, 169, 1483104 };
foreach (int number in numbers) {
   // Display value using default formatting.
   Console.Write("{0,-8}  -->   ", number.ToString());
   // Display value with 3 digits and leading zeros.
   Console.Write("{0,11:D3}", number);
   // Display value with 1 decimal digit.
   Console.Write("{0,13:N1}", number);
   // Display value as hexadecimal.
   Console.Write("{0,12:X2}", number);
   // Display value with eight hexadecimal digits.
   Console.WriteLine("{0,14:X8}", number);
}   
// The example displays the following output: 
//    -1403     -->         -1403     -1,403.0    FFFFFA85      FFFFFA85 
//    0         -->           000          0.0          00      00000000 
//    169       -->           169        169.0          A9      000000A9 
//    1483104   -->       1483104  1,483,104.0      16A160      0016A160

You can also format an Int32 value as a binary, octal, decimal, or hexadecimal string by calling the ToString(Int32, Int32) method and supplying the base as the method's second parameter. The following example calls this method to display the binary, octal, and hexadecimal representations of an array of integer values.

Dim numbers() As Integer = { -146, 11043, 2781913 }
Console.WriteLine("{0,8}   {1,32}   {2,11}   {3,10}", _
                  "Value", "Binary", "Octal", "Hex")
For Each number As Integer In numbers
   Console.WriteLine("{0,8}   {1,32}   {2,11}   {3,10}", _
                     number, Convert.ToString(number, 2), _
                     Convert.ToString(number, 8), _
                     Convert.ToString(number, 16))
Next       
' The example displays the following output: 
'       Value                             Binary         Octal          Hex 
'        -146   11111111111111111111111101101110   37777777556     ffffff6e 
'       11043                     10101100100011         25443         2b23 
'     2781913             1010100111001011011001      12471331       2a72d9
int[] numbers = { -146, 11043, 2781913 };
Console.WriteLine("{0,8}   {1,32}   {2,11}   {3,10}", 
                  "Value", "Binary", "Octal", "Hex");
foreach (int number in numbers) {
   Console.WriteLine("{0,8}   {1,32}   {2,11}   {3,10}", 
                     number, Convert.ToString(number, 2), 
                     Convert.ToString(number, 8), 
                     Convert.ToString(number, 16));
}      
// The example displays the following output: 
//       Value                             Binary         Octal          Hex 
//        -146   11111111111111111111111101101110   37777777556     ffffff6e 
//       11043                     10101100100011         25443         2b23 
//     2781913             1010100111001011011001      12471331       2a72d9

Working with Non-Decimal 32-Bit Integer Values

In addition to working with individual integers as decimal values, you may want to perform bitwise operations with integer values, or work with the binary or hexadecimal representations of integer values. Int32 values are represented in 31 bits, with the thirty-second bit used as a sign bit. Positive values are represented by using sign-and-magnitude representation. Negative values are in two's complement representation. This is important to keep in mind when you perform bitwise operations on Int32 values or when you work with individual bits. In order to perform a numeric, Boolean, or comparison operation on any two non-decimal values, both values must use the same representation.

Version Information

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1
Platforms

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Thread Safety

All members of this type are thread safe. Members that appear to modify instance state actually return a new instance initialized with the new value. As with any other type, reading and writing to a shared variable that contains an instance of this type must be protected by a lock to guarantee thread safety.