strrev() function in C language

  • strrev( ) function reverses a given string in C language. Syntax for strrev( ) function is given below.
char *strrev(char *string);
  • strrev( ) function is non standard function which may not available in standard library in C.

    Example program for strrev() function in C language:

    • In below program, string “Hello” is reversed using strrev( ) function and output is displayed as “olleH”.

     Output:

    String before strrev( ) : Hello
    String after strrev( )     : olleH

    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.
    S.no
    String functions
    Description
    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
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