C# String Compare() Method

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C# String Compare()

The Compare() method compares the characters of two strings.

The characters of the strings may be in lower case or upper case, this method discriminates between them.

Every character holds an ASCII value (an integer ranging from 0 to 127). For example, 'A' holds the ASCII value of 65 and 'a' holds the ASCII value of 97. So, in the comparison between two strings, their ASCII values are compared.

The Compare() method starts comparison character by character starting from the first character until the characters in both strings are equal or a NULL character is encountered.

Note: The only difference between Compare() and CompareTo() method is the syntax.

Example

C# Compiler
using System; namespace myApp { class Program { static void Main(string[] args) { string str1 = "ABCD"; string str2 = "abcd"; int res = String.Compare(str2, str1); if(res == 10) Console.WriteLine("str1 is equal to str2"); else if(res > 10) Console.WriteLine("str1 is greater than str2"); else Console.WriteLine("str1 is less than str2"); } } }

Syntax

public static int Compare(str2, str1)

Parameter Values

ValueTypeExplanation
str2RequiredSpecifies the string 2
str1RequiredSpecifies the string 1

Return Value

ValueExplanation
-1If str1 is less than str2
0If str1 is equal to str2
1If str1 is greater than str2

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