signReturns the sign of a number (1 if positive, -1 if negative, and 0 if zero).ParametersX (number)The input number.ExamplesATL in ScriptResult[[sign(5.5)]]1[[sign(-5.5)]]-1[[sign(0)]]0[[sign(-0)]]0[[sign(0.0)]]0[[sign(-0.0)]]0[[sign(0.01)]]1[[sign(-0.01)]]-1