isascii - test for 7-bit ASCII character

Syntax	#include <ctype.h> int isascii (int c);
Description	isascii() tests whether c is less than 128. (The US-ASCII codeset is defined for values from 0 through 127). isascii() is defined on all integer values. BS2000 isascii() is a synonym for isebcdic(). isascii() tests whether the value of the character c represents an EBCDIC character (values 0 - 255). (End)
Return val.	!= 0	The value of c lies between 0 and 127 (ASCII character).
	0	Not an ASCII character (values != 0 - 127).
	BS2000
	!= 0	The value of c lies between 0 and 255 (EBCDIC character).
	0	Not an EBCDIC character (values != 0 - 255). (End)
Notes	isascii() is implemented both as a function and as a macro. To generate a function call, the definition of the macro name must be first undefined (#undef isascii).
See also	isalnum(), isalpha(), iscntrl(), isdigit(), isgraph(), islower(), isprint(), ispunct(), isspace(), isupper(), isxdigit(), ctype.h, ascii_to_ebcdic(), ebcdic_to_ascii().