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VB.Net program to check string contains a number or not

Here, we are going to learn how to check string contains a number or not in VB.Net?
Submitted by Nidhi, on January 07, 2021 [Last updated : March 07, 2023]

Checking whether a string contains a number or not in VB.Net

Here, we will use IsNumeric() function to check a string contains a number or not.

Program/Source Code:

The source code to check string contains a number or not is given below. The given program is compiled and executed successfully.

VB.Net code to check string contains a number or not

'Vb.Net program to check a string contains a number or not.

Module Module1
    Sub Main()
        Dim num As String = "123"
        Dim ret As Boolean

        ret = IsNumeric(num)

        If (ret = True) Then
            Console.WriteLine("Specified string contains a number")
        Else
            Console.WriteLine("Specified string does not contain a number")
        End If
    End Sub
End Module

Output

Specified string contains a number
Press any key to continue . . .

Explanation

In the above program, we created a module Module1 that contains a Main() function.

The Main() function is the entry point for the program. Here, we created a variable of string type which is initialized with "123", and then check the value of the string, it contains a number or not using IsNumeric() function and then print an appropriate message on the console screen.

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