Showing content from https://en.cppreference.com/w/cpp/algorithm/../algorithm/../../cpp/header/../../c/header/ctype.html below:
Standard library header <ctype.h> - cppreference.com
This header is part of the null-terminated byte strings library.
Functions checks if a character is alphanumeric
(function) [edit] checks if a character is alphabetic
(function) [edit] checks if a character is lowercase
(function) [edit] checks if a character is an uppercase character
(function) [edit] checks if a character is a digit
(function) [edit] checks if a character is a hexadecimal character
(function) [edit] checks if a character is a control character
(function) [edit] checks if a character is a graphical character
(function) [edit] checks if a character is a space character
(function) [edit] checks if a character is a blank character
(function) [edit] checks if a character is a printing character
(function) [edit] checks if a character is a punctuation character
(function) [edit] converts a character to lowercase
(function) [edit] converts a character to uppercase
(function) [edit] [edit] Synopsis
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HTML:
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