How does strtok() split the string into tokens in C?

Question

Please explain to me the working of strtok() function. The manual says it breaks the string into tokens. I am unable to understand from the manual what it actua

Answer 1

strtok replaces the characters in the second argument with a NULL and a NULL character is also the end of a string.

http://www.cplusplus.com/reference/clibrary/cstring/strtok/