Variables

A variable is a global area that stores a value.

Rules for namig variables

• Must start with a letter, uppercase or lowercase e.g. x, A
• Case sensitive: x is different from X
• Can contain numbers after a letter like x1, x12, x123

How to declare a variable?

Declare variables the same way you would do on paper.

x = 1

Variables can be declared with expressions. Each declaraion or statement must exist on a newline.

x = 1 + 2

On declaration, variables can reference others in an expression.

x = 1
y = x + 1
z = x / (2 * y)

Multicharacter variable identifiers start with a letter followed by a number.

x1 = 1
x2 = 2
x3 = x1 + x2