Strcmp() function compares two strings for equality. - C String

Introduction

The following table describes the strcmp() function's return values in further detail.

Sample Function	Return Value	Description
strcmp(string1, string2)	0	string1 is equal to string2
strcmp(string1, string2)	<0	string1 is less than string2
strcmp(string1, string2)	>0	string1 is greater than string2

Demo Code

#include <stdio.h> 
#include <string.h> 

int main() { /*from   ww  w  .  j  a  v  a2s  .c  om*/
   char *str1 = "A"; 
   char *str2 = "A"; 
   char *str3 = "!"; 
   printf("\nstr1 = %s\n", str1); 
   printf("\nstr2 = %s\n", str2); 
   printf("\nstr3 = %s\n", str3); 
   printf("\nstrcmp(str1, str2) = %d\n", strcmp(str1, str2)); 
   printf("\nstrcmp(str1, str3) = %d\n", strcmp(str1, str3)); 
   printf("\nstrcmp(str3, str1) = %d\n", strcmp(str3, str1)); 

   if ( strcmp(str1, str2) == 0 ) 
      printf("\nLetter A is equal to letter A\n"); 
   if ( strcmp(str1, str3) > 0 ) 
      printf("Letter A is greater than character !\n"); 
   if ( strcmp(str3, str1) < 0 ) 
      printf("Character ! is less than letter A\n"); 

   return 0;
}

Result

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