Character Library

The character library provides functionality for classifying and transforming individual characters. These functions are accessible as methods of character values.

Methods

These are all called as "c.methodname()", where "c" is any character value.

c.toLower()

If c is an uppercase letter, returns the lowercase version of the letter. Otherwise, just returns the character itself.

c.toUpper()

If c is a lowercase letter, returns the uppercase version of the letter. Otherwise, just returns the character itself.

c.isAlpha()

Returns true if c is an alphabetic character; false otherwise.

c.isAlNum()

Returns true if c is an alphanumeric character; false otherwise.

c.isLower()

Returns true if c is a lowercase alphabetic character; false otherwise.

c.isUpper()

Returns true if c is an uppercase alphabetic character; false otherwise.

c.isDigit()

Returns true if c is a decimal digit (0 - 9); false otherwise.

c.isCtrl()

Returns true if c is a control character (characters 0x0 to 0x1f and character 0x7f); false otherwise.

c.isPunct()

Returns true if c is a punctuation character; false otherwise.

c.isSpace()

Returns true if c is a whitespace character; false otherwise.

c.isHexDigit()

Returns true if c is a hexadecimal digit (0 - 9, A - F, a - f); false otherwise.

c.isAscii()

Returns true if c is an ASCII character (<= 0x7f); false otherwise.