a named set of commands that can be called multiple times throughout a program

a chunk of code that repeatedly runs a section of the program a certain number of times

Creating a program that uses loops

Computing

Programming a screen turtle

Create an algorithm for a text-based program

Patterns and repeats

Count-controlled loops

Procedures in programming

In this unit pupils will create text-based programs which use repetition. They will plan, modify, and test commands to create shapes and patterns. They will explore the different types of loops that can be used to repeat commands in a program.

Repetition in programs

a named set of commands that can be called multiple times

a chunk of code that repeats a set number of times

Debugging removes all procedures from a program.

Debugging is used only in advanced programs.

Debugging helps find and fix errors in a program.

Which of the following is true about debugging?

to plan how the program will work before writing it

a named set of commands that can be reused

a command that controls the direction and shape of a pattern

What would be a sensible name for a procedure that draws a triangle?

Place these steps for creating a program in order.

What is a named set of commands that can be reused?

a type of procedure that cannot be called again

deleting parts of a program that don’t work

following a program line by line to predict what it will do

How does changing the value of a repeat command affect a loop?

Correct this command to draw a square: repeat [fd 100 rt 90].

Creating a program that uses loops

Lesson outcome