Question

Given:

Test123
Test 23
Test  456

What are some ways to get the number (that’s on the end) and place in an number variable?

Answer 1

var re = new Regex(@"(\d+)$");
(new List<String>(new[]{
    "Test123",
    "Test 123",
    "Test:123"
})).ForEach(t =>
{
    var m = re.Match(t);
    Int32 n = Int32.Parse(m.Captures[0].Value);
    Console.WriteLine("{0} => Found: {1}", t, n);
});

output:

Test123 => Found: 123
Test 123 => Found: 123
Test:123 => Found: 123

Demo: http://www.ideone.com/JGgEd