The string.h header file includes C standard library functions for string manipulation like copy, search, append, compare, splitting a string etc.
List of string.h Library Functions
Click on function names below to see detailed description of functions.| Function | Description |
|---|---|
| memchr | It searches for first occurence of a character in memory location. |
| memcmp | It compares the first n bytes of two memory blocks. |
| memcpy | It copies the first n bytes from one memory block to another. |
| memmove | It moves the first n bytes from one memory block to another considering overlap. |
| memset | It copies the character c to the first n bytes of the block of memory. |
| strcat | It appends one string at the end of another string. |
| strchr | It searches for the first occurrence of a character in the string. |
| strcmp | It compares two strings character by character. |
| strncmp | It compares first n characters of two strings. |
| strcpy | It copies characters from one string into another string. |
| strncpy | It copies first n characters from one string into another string. |
| strcspn | It calculates the length of prefix of a string which doesn't contain any character of another string. |
| strlen | It returns the length of a string. |
| strncat | It appends first n characters of one string at the end of another string. |
| strpbrk | It searches for the first occurrence of any character of a string in another string. |
| strrchr | It searches for the last occurrence of a character in the string. |
| strspn | It returns the length of the initial segment of a string which consists entirely of characters in another string. |
| strstr | It searches for the first occurrence of a string in another string. |
| strtok | It breaks a string into smaller tokens. |
Variable type in string.h Library
| Type | Description |
|---|---|
| size_t | This is unsigned integral type |
Macros in string.h Library
| Macro | Description |
|---|---|
| NULL | Null pointer constant |