Version 0.1.4

There is now a difference between saying "Hey, this variable exists now (with optional starting value)" and "Hey, modify this variable which already exists"

• let variableName = expression This creates a variable named variableName and gives it the value of expression when evaluated
• let variableName This creates a variable named variableName and gives it the value of null when evaluated
• variableName = expression This modifies the existing variable named variableName to have the value of expression when evalulated. If variableName is not a defined variable in the current scope, then it throws a RuntimeError
• variableName cannot be a keyword a.k.a. reserved word or a Global Constant Variable