Often, we need t to manipulate the String according to the need of the program. However, we can do that manually in a program but that is complex to comprehend and the program becomes very large.
So to make it easy, C provides us with some library functions. And these functions are defined under string.h header file in C.
There are various in-built String functions in C through which we can manipulate the String in a program. These functions are provided by the Standard C library.
Learn more on following topics before String function.
The following are the important string functions that mostly used in String manipulation in C:
| Function | Work of Function |
|---|---|
| strlen() | returns length of the string |
| strcpy() | copies the contents of string to another |
| strcat() | concatenates(joins) two strings |
| strcmp() | compares two strings |
| strlwr() | returns string in lowercase |
| strupr() | returns string in uppercase |
| strrev() | returns reverse a string. |
There are more functions such as:
- strchr()
- strstr()
- strset()
- strdup()