std::isblank

Defined in header `<cctype>`
int isblank( int ch );		(since C++11)

Checks if the given character is a blank character as classified by the currently installed C locale. Blank characters are whitespace characters used to separate words within a sentence. In the default C locale, only space (0x20) and horizontal tab (0x09) are classified as blank characters.

The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to EOF.

Parameters

character to classify

Return value

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

ASCII values (hex)		characters	`iscntrl` `iswcntrl`.	`isprint` `iswprint`.	`isspace` `iswspace`.	`isblank` `iswblank`.	`isgraph` `iswgraph`.	`ispunct` `iswpunct`.	`isalnum` `iswalnum`.	`isalpha` `iswalpha`.	`isupper` `iswupper`.	`islower` `iswlower`.	`isdigit` `iswdigit`.	`isxdigit` `iswxdigit`.
0 - 8	`0x00-0x08`	control codes (`NUL`, etc.)	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
9	`0x09`	tab (`\t`)	`≠0`	`0`	`≠0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
10 - 13	`0x0A-0x0D`	whitespaces (`\n`,`\v`,`\f`,`\r`)	`≠0`	`0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
14 - 31	`0x0E-0x1F`	control codes	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
32	`0x20`	space	`0`	`≠0`	`≠0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`
33 - 47	`0x21-0x2F`	`!"#$%&'()*+,-./`	`0`	`≠0`	`0`	`0`	`≠0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`
48 - 57	`0x30-0x39`	`0123456789`	`0`	`≠0`	`0`	`0`	`≠0`	`0`	`≠0`	`0`	`0`	`0`	`≠0`	`≠0`
58 - 64	`0x3a-0x40`	`:;<=>?@`	`0`	`≠0`	`0`	`0`	`≠0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`
65 - 70	`0x41-0x46`	`ABCDEF`	`0`	`≠0`	`0`	`0`	`≠0`	`0`	`≠0`	`≠0`	`≠0`	`0`	`0`	`≠0`
71 - 90	`0x47-0x5A`	`GHIJKLMNOPQRSTUVWXYZ`	`0`	`≠0`	`0`	`0`	`≠0`	`0`	`≠0`	`≠0`	`≠0`	`0`	`0`	`0`
91 - 96	`0x5B-0x60`	[\]^_`	`0`	`≠0`	`0`	`0`	`≠0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`
97 -102	`0x61-0x66`	`abcdef`	`0`	`≠0`	`0`	`0`	`≠0`	`0`	`≠0`	`≠0`	`0`	`≠0`	`0`	`≠0`
103-122	`0x67-0x7A`	`ghijklmnopqrstuvwxyz`	`0`	`≠0`	`0`	`0`	`≠0`	`0`	`≠0`	`≠0`	`0`	`≠0`	`0`	`0`
123-126	`0x7B-0x7E`	`{\|}~`	`0`	`≠0`	`0`	`0`	`≠0`	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`
127	`0x7F`	backspace character (`DEL`)	`≠0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`	`0`

Links:

http://en.cppreference.com/w/cpp/string/byte/isblank

doc_CPP

2016-10-11 10:03:32

Comments

isblank(std::locale) (C++11)	checks if a character is classified as a blank character by a locale (function template)
iswblank (C++11)	checks if a wide character is a blank character (function)
C documentation for `isblank`

std::isblank

Parameters

Return value

See also