You can get the Minimum value of three value using the Math.Min function.
using System; class Program/* w ww . j a v a2 s.co m*/ { static void Main(string[] args) { // Inputs Console.Write("Enter 1. number: "); string input1 = Console.ReadLine(); int number1 = Convert.ToInt32(input1); Console.Write("Enter 2. number: "); string input2 = Console.ReadLine(); int number2 = Convert.ToInt32(input2); Console.Write("Enter 3. number: "); string input3 = Console.ReadLine(); int number3 = Convert.ToInt32(input3); // Evaluating int min12 = Math.Min(number1, number2); int minimum = Math.Min(min12, number3); // Output Console.WriteLine("The least of entered numbers is " + minimum); } }