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C# - Compare Two Strings Using string.CompareTo() Method

Given two strings and we have to check whether strings are same or not?
[Last updated : March 20, 2023]

string.CompareTo() Method

The string.CompareTo() is a method of string class, it is used to compare two strings.

Syntax

int string.CompareTo(string str);

Return values

Method returns 0, greater than 0 or less than 0.

• 0 - If strings matched.
• >0 - First string is greatest on the basis of Unicode character.
• <<0 - First string is smallest on the basis of Unicode character.

C# program to compare two strings using string.CompareTo() method

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1 {
  class Program {
    static void Main() {
      string str = "Hello";

      if (str.CompareTo("Hello") == 0) {
        Console.WriteLine("String is matched");
      } else {
        Console.WriteLine("String is not matched");
      }

      if (str.CompareTo("Hiii") == 0) {
        Console.WriteLine("String is matched");
      } else {
        Console.WriteLine("String is not matched");
      }
    }
  }
}

Output

String is matched
String is not matched

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