c/string/byte/isspace

Checks if the given character is either
 * A standard white-space character:
 * Space ,
 * Form feed ,
 * Line feed ,
 * Carriage return ,
 * Horizontal tab ,
 * Vertical tab ,


 * Or a locale-specific white-space character.

The behavior is undefined if the value of is not representable as  and is not equal to eof.

Return value
Non-zero value if the character is a whitespace character, zero otherwise.