How can I convert a string into a unicode character?

Question

In Javascript \'\\uXXXX\' returns in a unicode character. But how can I get a unicode character when the XXXX part is a variable?

For example:<

Answer 1

String.fromCharCode("0x" + input)

or

String.fromCharCode(parseInt(input, 16)) as they are 16bit numbers (UTF-16)