ToInt64 Method (Single)

# Convert.ToInt64 Method (Single)

.NET Framework 4.6 and 4.5

Converts the value of the specified single-precision floating-point number to an equivalent 64-bit signed integer.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

## Syntax

```public static long ToInt64(
float value
)
```

#### Parameters

value
Type: System.Single

The single-precision floating-point number to convert.

#### Return Value

Type: System.Int64

value, rounded to the nearest 64-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

## Exceptions

Exception Condition
OverflowException

value is greater than Int64.MaxValue or less than Int64.MinValue.

## Examples

The following example attempts to convert each element in an array of Single values to a long integer.

```float[] values= { Single.MinValue, -1.38e10f, -1023.299f, -12.98f,
0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue };
long result;

foreach (float value in values)
{
try {
result = Convert.ToInt64(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 Int64 type.", value);
}
}
// The example displays the following output:
//    -3.40282346638529E+38 is outside the range of the Int64 type.
//    -13799999488 is outside the range of the Int64 type.
//    Converted the Double value -1023.29901123047 to the Int64 value -1023.
//    Converted the Double value -12.9799995422363 to the Int64 value -13.
//    Converted the Double value 0 to the Int64 value 0.
//    Converted the Double value 9.11299983940444E-16 to the Int64 value 0.
//    Converted the Double value 103.918998718262 to the Int64 value 104.
//    Converted the Double value 17834.19140625 to the Int64 value 17834.
//    3.40282346638529E+38 is outside the range of the Int64 type.
```

## Version Information

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1