Decimal.Decrement Operator
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Decrements the Decimal operand by one.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- d
- Type: System.Decimal
The Decimal operand.
| Exception | Condition |
|---|---|
| OverflowException | The return value is less than MinValue or greater than MaxValue. |
The following code example applies the Decrement operator to several Decimal values.
// Example of the decimal increment, decrement, unary negation, and // unary plus operators. using System; class Example { // Get the exception type name; remove the namespace prefix. public static string GetExceptionType(Exception ex) { string exceptionType = ex.GetType().ToString(); return exceptionType.Substring( exceptionType.LastIndexOf('.') + 1); } // Display the argument and the incremented and decremented values. public static void DecIncrDecrUnary(System.Windows.Controls.TextBlock outputBlock, decimal argument) { decimal toBeIncr = argument; decimal toBeDecr = argument; outputBlock.Text += String.Format("{0,-26}{1}", "decimal argument: ", argument) + "\n"; // Catch the exception if the increment operator throws one. outputBlock.Text += String.Format("{0,-26}", "argument ++"); try { toBeIncr++; outputBlock.Text += String.Format("{0}", toBeIncr) + "\n"; } catch (Exception ex) { outputBlock.Text += String.Format("{0}", GetExceptionType(ex)) + "\n"; } // Catch the exception if the decrement operator throws one. outputBlock.Text += String.Format("{0,-26}", "argument --"); try { toBeDecr--; outputBlock.Text += String.Format("{0}", toBeDecr) + "\n"; } catch (Exception ex) { outputBlock.Text += String.Format("{0}", GetExceptionType(ex)) + "\n"; } outputBlock.Text += "\n"; } public static void Demo(System.Windows.Controls.TextBlock outputBlock) { outputBlock.Text += String.Format("This example of the decimal increment, " + "decrement, unary negation, \nand unary plus operators " + "generates the following output. It \ndisplays the " + "results of the operators on several decimal values.\n") + "\n"; // Create objects to compare with the reference. DecIncrDecrUnary(outputBlock, 0.000000123M); DecIncrDecrUnary(outputBlock, new decimal(123000000, 0, 0, false, 9)); DecIncrDecrUnary(outputBlock, -new decimal(123000000, 0, 0, false, 9)); DecIncrDecrUnary(outputBlock, +decimal.MaxValue); DecIncrDecrUnary(outputBlock, -decimal.MaxValue); DecIncrDecrUnary(outputBlock, +7.5000000000000000000000000001M); } } /* This example of the decimal increment, decrement, unary negation, and unary plus operators generates the following output. It displays the results of the operators on several decimal values. decimal argument: 0.000000123 argument ++ 1.000000123 argument -- -0.999999877 decimal argument: 0.123000000 argument ++ 1.123000000 argument -- -0.877000000 decimal argument: -0.123000000 argument ++ 0.877000000 argument -- -1.123000000 decimal argument: 79228162514264337593543950335 argument ++ OverflowException argument -- 79228162514264337593543950334 decimal argument: -79228162514264337593543950335 argument ++ -79228162514264337593543950334 argument -- OverflowException decimal argument: 7.5000000000000000000000000001 argument ++ 8.500000000000000000000000000 argument -- 6.5000000000000000000000000001 */
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