different type variable

// source code different type variable
using System;
class TypeDemo
{
static void Main()
{
var x1 = 100;
Console.WriteLine(x.GetType());
var s1 = "Hello";
Console.WriteLine(s.GetType());
var f1= 3.14f;
Console.WriteLine(f.GetType());
var b1 = true;
Console.WriteLine(b.GetType());
}
}