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30.Dd $Mdocdate: June 29 2021 $
31.Dt ISASCII 3
32.Os
33.Sh NAME
34.Nm isascii
35.Nd ASCII character test
36.Sh SYNOPSIS
37.In ctype.h
38.Ft int
39.Fn isascii "int c"
40.Sh DESCRIPTION
41The
42.Fn isascii
43function tests for an ASCII character,
44which is any character in the range from 0 to 0177, inclusive.
45.Sh RETURN VALUES
46The
47.Fn isascii
48function returns zero if the character tests false or
49non-zero if the character tests true.
50.Sh SEE ALSO
51.Xr isalnum 3 ,
52.Xr isalpha 3 ,
53.Xr isblank 3 ,
54.Xr iscntrl 3 ,
55.Xr isdigit 3 ,
56.Xr isgraph 3 ,
57.Xr islower 3 ,
58.Xr isprint 3 ,
59.Xr ispunct 3 ,
60.Xr isspace 3 ,
61.Xr isupper 3 ,
62.Xr isxdigit 3 ,
63.Xr stdio 3 ,
64.Xr toascii 3 ,
65.Xr tolower 3 ,
66.Xr toupper 3 ,
67.Xr ascii 7
68.Sh STANDARDS
69The
70.Fn isascii
71function conforms to
72.St -xpg4 .
73.Sh HISTORY
74The
75.Fn isascii
76function first appeared in
77.At v7 .
78