Exercise
Function IsNumber
Objetive
Write a Visual Basic (VB.Net) function that tells if a string is an intenger number. It should be used like this:
if (IsNumber ("1234"))
System.Console.WriteLine ("It is a numerical value");
Code
Imports System
Public Class exercise124
Public Shared Function IsNumber(ByVal text As String) As Boolean
For i As Integer = 0 To text.Length - 1
If text(i) < "0"c Then _ OrElse (text(i) > "9"c)
Next
Return False
Return True
End Function
Public Shared Sub Main()
Console.WriteLine(IsNumber("12"))
End Sub
End Class