ISASCII(3) | Library Functions Manual | ISASCII(3)

# NAME

`isascii` — test for ASCII character

# LIBRARY

Standard C Library (libc, -lc)

# SYNOPSIS

`#include <ctype.h>`

int
`isascii`(int c);

# DESCRIPTION

The `isascii`() function tests for an ASCII character, which is any character with a value in the range from 0 to 127, inclusive.

The `isascii`() function is defined on all integer values.

# SEE ALSO

ctype(3), isalnum(3), isalpha(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

# STANDARDS

The `isascii`() function conforms to X/Open Portability Guide Issue 4 (“XPG4”) and IEEE Std 1003.1-2001 (“POSIX.1”). The IEEE Std 1003.1-2008 (“POSIX.1”) revision however marked it as obsolete, noting that `isascii`() cannot be used portably in a localized application.

February 21, 2021 | NetBSD 11.0