strcmpi() function in C Language

  • strcmpi( ) function in C is same as strcmp() function. But, strcmpi( ) function is not case sensitive. i.e, “A” and “a” are treated as same characters. Where as, strcmp() function treats “A” and “a” as different characters.
  • strcmpi() function is non standard function which may not available in standard library in C.
  • Both functions compare two given strings and returns zero if they are same.
  • If length of string1 < string2, it returns < 0 value. If length of string1 > string2, it returns > 0 value. Syntax for strcmp( ) function is given below.
int strcmpi ( const char * str1, const char * str2 );

Example program for strcmpi( ) function in C Language:

    • In this program, strings “fresh” and “refresh” are compared. 0 is returned when strings are equal. Negative value is returned when str1 < str2 and positive value is returned when str1 > str2.


0 -1 1

Other String functions in C Language:

    • String.h header file supports all the string functions in C language. All the string functions are given below.
String functions
1strcat ( ) Concatenates str2 at the end of str1.
2strncat ( ) appends a portion of string to another
3strcpy ( ) Copies str2 into str1
4strncpy ( ) copies given number of characters of one string to another
5strlen ( ) gives the length of str1.
6strcmp ( ) Returns 0 if str1 is same as str2. Returns <0 if strl < str2. Returns >0 if str1 > str2.
7strcmpi.(.) Same as strcmp() function. But, this function negotiates case.  “A” and “a” are treated as same.
8strchr ( ) Returns pointer to first occurrence of char in str1.
9strrchr ( ) last occurrence of given character in a string is found
10strstr ( ) Returns pointer to first occurrence of str2 in str1.
11strrstr ( ) Returns pointer to last occurrence of str2 in str1.
12strdup ( ) duplicates the string
13strlwr ( ) converts string to lowercase
14strupr ( ) converts string to uppercase
15strrev ( ) reverses the given string
16strset ( ) sets all character in a string to given character
17strnset ( ) It sets the portion of characters in a string to given character
18strtok ( ) tokenizing given string using delimiter appreciates your contribution please mail us the questions you have to so that it will be useful to our job search community

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