Example. We use these functions with two characters. The character "a" has a Val of 0 and an Asc of 97. In ASCII, the letter "a" is represented with the number 97.
Info The Val function returned zero because "a" is not a number itself. Val just returns 0 on non-digits.
And The second Char in this example contains the digit "2". Val here returns 2. This is the digit contained in the character.
Finally For "2" the AscW function returns 50. This is the ASCII numeric representation for the character "2".
Module Module1
Sub Main()
' Use Val and AscW on char.
Dim c As Char = "a"c
Dim i As Integer = Val(c)
Dim a As Integer = Asc(c)
Console.WriteLine(c)
Console.WriteLine(i)
Console.WriteLine(a)
' Another character.
Dim c2 As Char = "2"c
Dim i2 As Integer = Val(c2)
Dim a2 As Integer = AscW(c2) ' AscW is similar to Asc
Console.WriteLine(c2)
Console.WriteLine(i2)
Console.WriteLine(a2)
End Sub
End Modulea
0
97
2
2
50
A review. The Val, Asc and AscW Functions are useful in different situations. If you want to convert a Char to its underlying integer representation, the Asc and AscW functions are ideal.
Final note. If you want to get the number from the Char and turn it into an Integer, the Val function is best. The Val, Asc and AscW functions are only available in VB.NET, not C#.
Dot Net Perls is a collection of tested code examples. Pages are continually updated to stay current, with code correctness a top priority.
Sam Allen is passionate about computer languages. In the past, his work has been recommended by Apple and Microsoft and he has studied computers at a selective university in the United States.
This page was last updated on Mar 28, 2022 (edit link).
