isNaN

isNaN( 
f_flownum 
) 
=> t / nil

Description

Checks whether the given flownum argument represents NaN (not-a-number). Else, it returns nil.

Arguments

Value Returned

Examples

nan = 0.0 * 2.0 * 1e999
isNan (nan) 
=> t

isNan (123.456) 
=> nil

Related Topics

Arithmetic Functions