Character Classification Methods

The following table describes character classification methods.

Method	Description
Clib Is Alphabetic Method	Determines if a character is alphabetic.
Clib Is Alphanumeric Method	Determines if a character is alphanumeric.
Clib Is ASCII Method	Determines if a character is an ASCII character.
Clib Is Control Method	Determines if a character is a control.
Clib Is Digit Method	Determines if character is a decimal digit.
Clib Is Hexadecimal Method	Determines if a character is a hexadecimal-digit character.
Clib Is Lowercase Method	Determines if a letter is a lowercase alphabetic letter.
Clib Is Printable Method	Determines if a character is a printable character.
Clib Is Printable Not Space Method	Determines if character is a printing character except for space.
Clib Is Punctuation Mark Method	Determines if a character is a punctuation character.
Clib Is Space Method	Determines if a character is a white-space character.
Clib Is Uppercase Method	Determines if a character is an uppercase alphabetic character.
Is Finite Method	Determines if a value is finite.
Is NaN Method	Determines if a value is not a number (NaN).