VB.NET Val, Asc

The VB.NET programming language

Val, Asc and AscW convert characters. From the Char, we get either its integer representation or its numeric representation. Using these Functions, we convert characters into the appropriate integer value.

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. The Val function returned zero because "a" is not a number itself.

VB.NET program that uses Val, Asc, AscW

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 Module

Output

a
0
97
2
2
50
Char type

The second Char in this example contains the digit "2". The Val function here returns 2. This is the digit contained in the character. The AscW function here returns 50. This is the ASCII numeric representation for the character "2".

Note:The Val, Asc and AscW functions are only available in the VB.NET language, not the C# language.

Summary

Programming tip

In this example, we saw how 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.

Tip:If you want to get the number from the Char and turn it into an Integer, the Val function is best.


VB.NET: Number