← All lessons/Variables & Data Types· Lesson 9 of 32

Variables in drawings

Use one variable in several calls so a tweak in one place updates the whole drawing.

About 7 min

Write once, reuse everywhere

Variables shine when a value shows up in more than one place. Store it once, then reuse the name. Change the variable and every shape that uses it updates together — no hunting through your code.

One size variable controls three circles. Change size to 60!

TIP

This is the real payoff of variables: less repetition, and changes happen in one spot instead of many.

Your turn

Declare a variable named size set to 60. Then draw three ellipses in a row that all use size for their width and height — for example centered at (120, 200), (200, 200), and (280, 200).

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