C string.h library function: The <string.h> header defines one variable type, one macro, and various functions for manipulating arrays of characters.
Library Variables
| Variable | Description |
|---|---|
| size_t | This is the unsigned integral type and is the result of the size of the keyword |
C <string.h> library function
Library Macros
| Macro | Description |
|---|---|
| NULL | This macro is the value of a null pointer constant |
Library Functions
List of inbuilt functions c functions in C string.h library function.
| String functions | Description |
|---|---|
| strcat ( ) | Concatenates str2 at the end of str1 |
| strncat ( ) | Appends a portion of the string to another |
| strcpy ( ) | Copies str2 into str1 |
| strncpy ( ) | Copies were given the number of characters of one string to another |
| strlen ( ) | Gives the length of str1 |
| strcmp ( ) | Returns 0 if str1 is the same as str2. Returns <0 if strl < str2. Returns >0 if str1 > str2 |
| strcmpi ( ) | Same as strcmp() function. But, this function negotiates the case. “A” and “a” are treated as same |
| strchr ( ) | Returns pointer to the first occurrence of char in str1 |
| strrchr ( ) | the last occurrence of a given character in a string is found |
| strstr ( ) | Returns pointer to the first occurrence of str2 in str1 |
| strrstr ( ) | Returns pointer to the last occurrence of str2 in str1 |
| strdup ( ) | Duplicates the string |
| strlwr ( ) | Converts string to lowercase |
| strupr ( ) | Converts string to uppercase |
| strrev ( ) | Reverses the given string |
| strset ( ) | Sets all character in a string to given character |
| strnset ( ) | It sets the portion of characters in a string to the given character |
| strtok ( ) | Tokenizing given string using a delimiter |