From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/string%2Fbyte%2Fisalpha.html | 121 --------------------------------- 1 file changed, 121 deletions(-) delete mode 100644 devdocs/c/string%2Fbyte%2Fisalpha.html (limited to 'devdocs/c/string%2Fbyte%2Fisalpha.html') diff --git a/devdocs/c/string%2Fbyte%2Fisalpha.html b/devdocs/c/string%2Fbyte%2Fisalpha.html deleted file mode 100644 index 3e6a7c4c..00000000 --- a/devdocs/c/string%2Fbyte%2Fisalpha.html +++ /dev/null @@ -1,121 +0,0 @@ -

isalpha

Defined in header <ctype.h> 
int isalpha( int ch );
-

Checks if the given character is an alphabetic character, i.e. either an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), or a lowercase letter (abcdefghijklmnopqrstuvwxyz).

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In locales other than "C", an alphabetic character is a character for which isupper() or islower() returns true or any other character considered alphabetic by the locale. In any case, iscntrl(), isdigit(), ispunct() and isspace() will return false for this character.

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

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Parameters

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ch - character to classify

Return value

Non-zero value if the character is an alphabetic character, zero otherwise.

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Example

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Demonstrates the use of isalpha with different locales (OS-specific).

-
#include <ctype.h>
-#include <stdio.h>
-#include <locale.h>
- 
-int main(void)
-{
-    unsigned char c = '\xdf'; // German letter ß in ISO-8859-1
- 
-    printf("isalpha('\\xdf') in default C locale returned %d\n", !!isalpha(c));
- 
-    setlocale(LC_CTYPE, "de_DE.iso88591");
-    printf("isalpha('\\xdf') in ISO-8859-1 locale returned %d\n", !!isalpha(c));
-}

Possible output:

-
isalpha('\xdf') in default C locale returned 0
-isalpha('\xdf') in ISO-8859-1 locale returned 1

References

See also

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-
(C95)
 checks if a wide character is alphabetic
(function)
C++ documentation for isalpha
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ASCII values characters

iscntrl
iswcntrl

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isprint
iswprint

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isspace
iswspace

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isblank
iswblank

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isgraph
iswgraph

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ispunct
iswpunct

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isalnum
iswalnum

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isalpha
iswalpha

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isupper
iswupper

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islower
iswlower

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isdigit
iswdigit

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isxdigit
iswxdigit

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decimal hexadecimal octal
0–8 \x0–\x8 \0–\10 control codes (NUL, etc.) -≠0 0 0 0 0 0 0 0 0 0 0 0
9 \x9 \11 tab (\t) -≠0 0 -≠0 -≠0 0 0 0 0 0 0 0 0
10–13 \xA–\xD \12–\15 whitespaces (\n, \v, \f, \r) -≠0 0 -≠0 0 0 0 0 0 0 0 0 0
14–31 \xE–\x1F \16–\37 control codes -≠0 0 0 0 0 0 0 0 0 0 0 0
32 \x20 \40 space 0 -≠0 -≠0 -≠0 0 0 0 0 0 0 0 0
33–47 \x21–\x2F \41–\57 !"#$%&'()*+,-./ 0 -≠0 0 0 -≠0 -≠0 0 0 0 0 0 0
48–57 \x30–\x39 \60–\71 0123456789 0 -≠0 0 0 -≠0 0 -≠0 0 0 0 -≠0 -≠0
58–64 \x3A–\x40 \72–\100 :;<=>?@ 0 -≠0 0 0 -≠0 -≠0 0 0 0 0 0 0
65–70 \x41–\x46 \101–\106 ABCDEF 0 -≠0 0 0 -≠0 0 -≠0 -≠0 -≠0 0 0 -≠0
71–90 \x47–\x5A \107–\132 GHIJKLMNOP
QRSTUVWXYZ 		0 -≠0 0 0 -≠0 0 -≠0 -≠0 -≠0 0 0 0
91–96 \x5B–\x60 \133–\140 [\]^_` 0 -≠0 0 0 -≠0 -≠0 0 0 0 0 0 0
97–102 \x61–\x66 \141–\146 abcdef 0 -≠0 0 0 -≠0 0 -≠0 -≠0 0 -≠0 0 -≠0
103–122 \x67–\x7A \147–\172 ghijklmnop
qrstuvwxyz 		0 -≠0 0 0 -≠0 0 -≠0 -≠0 0 -≠0 0 0
123–126 \x7B–\x7E \172–\176 {|}~ 0 -≠0 0 0 -≠0 -≠0 0 0 0 0 0 0
127 \x7F \177 backspace character (DEL) -≠0 0 0 0 0 0 0 0 0 0 0 0
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Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/string/byte/isalpha -

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