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strcoll() in C/C++

  • Difficulty Level : Medium
  • Last Updated : 20 Dec, 2019

strcoll() is a built-in library function and is declared in <string.h> header file. This function compares the string pointed to by str1 with the one pointed by str2.The strcoll() function performs the comparison based on the rules of the current locale’s LC_COLLATE category.
Syntax:

int strcoll(const char *str1, const char *str2)

Parameters: Function strcoll() takes two strings as parameters and returns an integer value.

Value                   Meaning
less than zero          str1 is less than str2
zero                    str1 is equal to str2
greater than zero       str1 is greater than str2
  1. less than zero : When str1 is less than str2




    // C program to illustrate strcoll()
    #include <stdio.h>
    #include <string.h>
      
    int main()
    {
        char str1[10];
        char str2[10];
        int ret;
      
        strcpy(str1, "geeksforgeeks");
        strcpy(str2, "GEEKSFORGEEKS");
      
        ret = strcoll(str1, str2);
      
        if (ret > 0) {
            printf("str1 is greater than str2");
        } else if (ret < 0) {
            printf("str1 is lesser than str2");
        } else {
            printf("str1 is equal to str2");
        }
      
        return (0);
    }

    Output:

    str1 is greater than str2
    
  2. greater than zero :when str1 is greater than str2




    // C program to illustrate strcoll()
    #include <stdio.h>
    #include <string.h>
      
    int main()
    {
        char str1[10];
        char str2[10];
        int ret;
      
        strcpy(str1, "GEEKSFORGEEKS");
        strcpy(str2, "geeksforgeeks");
      
        ret = strcoll(str1, str2);
      
        if (ret > 0) {
            printf("str1 is greater than str2");
        } else if (ret < 0) {
            printf("str1 is lesser than str2");
        } else {
            printf("str1 is equal to str2");
        }
      
        return (0);
    }

    Output:

    str1 is lesser than str2
    
  3. Is equal to zero : when str1 is equal to str2






    // C program to illustrate strcoll()
      
    #include <stdio.h>
    #include <string.h>
      
    int main()
    {
        char str1[10];
        char str2[10];
        int ret;
      
        strcpy(str1, "GEEKSFORGEEKS");
        strcpy(str2, "GEEKSFORGEEKS");
      
        ret = strcoll(str1, str2);
      
        if (ret > 0) {
            printf("str1 is greater than str2");
        } else if (ret < 0) {
            printf("str1 is lesser than str2");
        } else {
            printf("str1 is equal to str2");
        }
      
        return (0);
    }

    Output:

    str1 is equal to str2
    

Related Function : strcmp(), memcmp()

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