Variable Calculator

This is a small calculator program, which allows you to make your own variables.

All variable names must only be one letter long, otherwise an error will appear.

You can assign a variable by stating its name, an equals sign, and then its value or expression. Eg:

a = 10
e= 7+ 3.5
j=4 *6
f = 9 / 3

All of those definitions are allowed because they all have; a one character variable name, an equals sign, and a value or expression. However,

num = 8
n = &4
a = *+

are all illegal. num = 8 Is illegal because the variable name has more than one character

n = &4

Is illegal because the value has to be a number or operater.

a = *+

Is illegal because you can't have an operater with numbers before and after.