CONSTANT, SHARED, GLOBAL
CONSTANT declares a constant variable. The constant variable's value is set when the constant is declared. The value may never be changed. While a constant variable cannot be changed, it can be deleted. See the examples below.
'declares a local variable CONSTANT tax_rate = .05 tax_rate = .06 ERROR: Attempt to assign to constant ? tax_rate = 0.05 'declares a global constant variable CONSTANT GLOBAL tax_rate = .05 'delete a constant variable DELETE constant tax_rate