I have a question about this code Hidden=(1-Sgn(#Show#)). What does this code express?

Code:
[Variables]Show=0[ContainerVisible]Hidden=(1-Sgn(#Show#))Meter=ShapeShape=Rectangle ([Background:X]+1),([Background:YH]+1),([Background:W]-2),(#ContainerH#),10 | Fill Color 0,0,0,#Transparency# | StrokeWidth 2 | Stroke Color 0,0,0,140UpdateDivider=-1DynamicVariables=1
Statistics: Posted by Rooky_89 — Today, 5:34 pm