# undeclareVariable -- clears assignment of an input gate to a variable name

## Description

This method undoes the action of declareVariable, by reverting the assignment of an InputGate to a symbol.

 i1 : declareVariable x o1 = x o1 : InputGate i2 : x + 1 o2 = (x + 1) o2 : SumGate i3 : undeclareVariable x o3 = x o3 : Symbol i4 : x o4 = x o4 : Symbol