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VB.NET Math.Abs: Absolute Value

Use the Math.Abs Function. Abs computes absolute values for Integers, Doubles and other types.
Math.Abs returns the absolute value of a number. In mathematics the absolute value of a number is positive. The numbers -10 and 10 both have the absolute value of 10. In VB.NET, the Math.Abs function provides this capability.
Example. This program uses Integer and Double types with the Math.Abs function. Only the negative inputs have a different absolute value. The value -1000 has an absolute value of 1000. And -100.123 has an absolute value of 100.123.IntegerDouble

Tip: The value returned from Math.Abs is of the same type as the value you pass to it.

So: If you pass a Double as the argument to Math.Abs, it also returns a Double.

VB.NET program that computes absolute values Module Module1 Sub Main() ' Absolute values of integers. Dim value1 As Integer = -1000 Dim value2 As Integer = 20 Dim abs1 As Integer = Math.Abs(value1) Dim abs2 As Integer = Math.Abs(value2) Console.WriteLine(value1) Console.WriteLine(abs1) Console.WriteLine(value2) Console.WriteLine(abs2) ' Absolute values of doubles. Dim value3 As Double = -100.123 Dim value4 As Double = 20.2 Dim abs3 As Double = Math.Abs(value3) Dim abs4 As Double = Math.Abs(value4) Console.WriteLine(value3) Console.WriteLine(abs3) Console.WriteLine(value4) Console.WriteLine(abs4) End Sub End Module Output -1000 1000 20 20 -100.123 100.123 20.2 20.2
The internal code of Math.Abs depends on the value type. On some types, such as Integer, the function simply tests for a negative number and then negates it. For types such as Decimal and Double, other methods are internally called.
Summary. Computing absolute values of a number is useful in a variety of numeric contexts. It is useful even in functions that compute hashes. The Math.Abs function from the .NET Framework provides a convenient and heavily-tested command.
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