The string comparision functions are-
1. strcmp() Compares two strings (case sensitive)
2. strcasecmp() Compares two strings (not case sensitive)
3. strnatcmp(str1, str2); Compares two strings in ASCII order, but any numbers are compared numerically
4. strnatcasecmp(str1, str2); Compares two strings in ASCII order, case insensitive, numbers as numbers
5. strncasecomp() Compares two strings (not case sensitive) and allows you to specify how many characters to compare
6. strspn() Compares a string against characters represented by a mask
7. strcspn() Compares a string that contains characters not in the mask