Creating variables · Procedural

Build the idea

Start with the concept and its key vocabulary.

Key idea

Create variables using meaningful names and the assignment operator.

A variable is a labelled place in memory. The line score = 0 creates a variable called score and assigns the integer 0 to it. Choose names that explain the value; player_name is clearer than x. A constant stores a value that should stay fixed.

Variable

A named location in memory that stores a value which can change.

Constant

A named value that should not change while a program runs.

Assignment

Storing a value in a variable using the = operator.

Identifier

The exact name given to a variable, constant or subroutine.

Keep these in mind

Use = to assign a value.
The variable name goes on the left and its value goes on the right.
Names cannot contain spaces and should describe their purpose.
ERL declares a constant with const; Python uses an UPPERCASE name by convention.

Build the idea

Start with the concept and its key vocabulary.

Key idea

Create variables using meaningful names and the assignment operator.

Variable

A named location in memory that stores a value which can change.

Constant

A named value that should not change while a program runs.

Assignment

Storing a value in a variable using the = operator.

Identifier

The exact name given to a variable, constant or subroutine.

Keep these in mind

Use = to assign a value.
The variable name goes on the left and its value goes on the right.
Names cannot contain spaces and should describe their purpose.
ERL declares a constant with const; Python uses an UPPERCASE name by convention.