ILE C/C++ Run-Time Library Functions

Character Testing


Function Header File Page Description
isalnum() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for alphanumeric characters.
isalpha() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for alphabetic characters.
isascii() ctype.h "isascii() -- Test for Character Representable as ASCII Value" Tests for ASCII values.
isblank() ctype.h "isblank() -- Test for Blank or Tab Character" Tests for blank or tab characters.
iscntrl() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for control characters.
isdigit() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for decimal digits.
isgraph() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for printable characters excluding the space.
islower() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for lowercase letters.
isprint() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for printable characters including the space.
ispunct() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for punctuation characters as defined in the locale.
isspace() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for white-space characters.
isupper() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for uppercase letters.
isxdigit() ctype.h "isalnum() - isxdigit() -- Test Integer Value" Tests for wide hexadecimal digits 0 through 9, a through f, or A through F.


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