strcmp function : string.h >> Compare two strings

strcmp function >> string.h >> Compare two strings
What strcmp Actually Does ?
  1. Function takes two Strings as parameter
  2. It returns integer .
Syntax :

int strcmp ( char *s1, char *s2 ) ;

Return Type
Return Type
Condition
-ve ValueString1 < String2
+ve ValueString1 > String2
0 ValueString1 = String2
Live Example 1 : Two strings are Equal 
                char s1[10] = “SAM” , s2[10]=”SAM” ;
                int len;
                len = strcmp (s1,s2);
                if (len == 0)
                       printf ( ” Two Strings are Equal “);
Live Example 2 : String1 is Greater than String2
                char s1[10] = “SAM” , s2[10]=”sam” ;
                int len;
                len = strcmp (s1,s2);
                printf ( “%d” , len );           // Output -ve
Reason  : 
  1. ASCII value of “SAM” is smaller than “sam” 
  2. ASCII value of ‘S’ is smaller than ‘s’ 
Live Example 3 : String1 is Smaller than String1
                char s1[10] = “sam” , s2[10]=”SAM” ;
                int len;
                len = strcmp (s1,s2);
                printf ( “%d” , len );           // Output +ve
Reason  : 
  1. ASCII value of “SAM” is greater than “sam” 
  2. ASCII value of ‘S’ is greater than ‘s’  
Note :
  • This function is Case sensitive
  • Header file  :  string.h
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