xxxxxxxxxx
accept a string and display if it contains number
xxxxxxxxxx
"abc3def".Any(c => char.IsDigit(c));
// Or to make it shorter:
"abc3def".Any(char.IsDigit);
xxxxxxxxxx
using System;
using System.Text.RegularExpressions;
class Program
{
static void Main()
{
string input = "12345";
bool containsOnlyNumbers = Regex.IsMatch(input, @"^[0-9]+$");
Console.WriteLine(containsOnlyNumbers); // Outputs: True
}
}