Learn to Program with Scratch by Majed Marji
Author:Majed Marji
Language: eng
Format: epub
Tags: COMPUTERS / Programming Languages / General
ISBN: 9781593275785
Publisher: No Starch Press
Published: 2014-02-20T00:00:00+00:00
Figure 6-10. The main script of the Tutor sprite
After asking the user to enter a choice, the Tutor sprite waits for the user’s input and uses three if/else blocks to process it. If the user entered a valid choice (that is, 1, 2, or 3), the script calls the appropriate procedure to calculate the area of the indicated shape. Otherwise, the script invokes the say command to inform the user that the choice entered is invalid. The procedures for calculating the areas of the three shapes are shown in Figure 6-11.
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