Returns the absolute value of a numeric expression.
Abs (Number)
Double
Number: A numeric expression for which you want the absolute value. Positive numbers, including 0, are returned unchanged, negative numbers being converted to positive numbers of the same magnitude.
The following example uses the Abs function to calculate the difference between two values. It does not matter which value you enter first.
5 Invalid procedure call
Sub ExampleDifference
Dim siW1 As Single
Dim siW2 As Single
siW1 = Int(InputBox("Please enter the first amount","Value Input"))
siW2 = Int(InputBox("Please enter the second amount","Value Input"))
Print "The difference is "; Abs(siW1 - siW2)
End Sub