Full prototype:
int isspace(int);
Purpose and Notes:
Tests whether or not the character passed into the function is a locale-specific or standard white-space character such as space ' ', form feed '\f', newline '\n', carriage return '\r', horizontal tab '\t', veritcal tab '\v'.
Returns:
int- C-style true if the character passed in is a whitespace character according to the set locale and a C-style false otherwise.
Argument 1:
int- A character (including the EOF character, hence int instead of char) to be evaluated to determine if it is a white-space character or not according to the set locale.