7.4.6
Character classification functions
Character classification functions are as follows.
Table 7.8 | Character Classification Functions |
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isalnum
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Identification of ASCII letter or numeral
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isalpha
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Identification of ASCII letter
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isascii
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Identification of ASCII code
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isupper
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Identification of upper-case character
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islower
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Identification of lower-case character
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isdigit
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Identification of decimal number
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isxdigit
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Identification of hexadecimal number
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iscntrl
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Identification of control character
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ispunct
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Identification of delimiter character
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isspace
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Identification of space/tab/carriage return/line feed/vertical tab/page feed
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isprint
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Identification of display character
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isgraph
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Identification of display character other than space
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