C Standard Libraries C++
<cctype>
Overview
Table of Ranges
| Function | Ranges (numeric) | Ranges (char) |
| isalnum() | [48, 57], [65, 90], and [97, 122] | ['0', '9'], ['A', 'Z'], and ['a', 'z'] |
| isalpha() | [65, 90] and [97, 122] | ['A', 'Z'] and ['a', 'z'] |
| iscntrl() | [0, 31] and 127 | [NUL, US] and DEL |
| isdigit() | [48, 57] | ['0', '9'] |
| isgraph() | [33, 126] | ['!', '~'] |
| islower() | [97, 122] | ['a', 'z'] |
| isprint() | [32, 126] | [' ', '~'] |
| ispunct() | [33, 47], [58, 64], [91, 96], and [123, 126] | ['!', '/'], [':', '@'], ['[', '`'], and ['{', '~'] |
| isspace() | [9, 13] and 32 | [HT, CR] and ' ' |
| isupper() | [65, 90] | ['A', 'Z'] |
| isxdigit() | [48, 57], [65, 70], and [97, 102] | ['0', '9'], ['A', 'F'], and ['a', 'f'] |
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