Computer Science

the process of repeating a sequence of instructions within a program loop

an iterative statement that will repeat for the length of a given sequence

For loops

While loops

Using trace tables

Nested loops

Randomisation

Validating data input in a program

Designing robust programs

Programming project: iteration I

Programming project: iteration II

In this unit pupils discover how iteration is used to replicate parts of a program. They will analyse the difference between count and condition controlled iteration and how trace tables can be used to trace through loops. They will explore data validation techniques and robust program design.

Programming: iteration

What does a for loop use to control iteration?

What happens if a for loop's range is set to range(5)?

Which of these is an example of iteration?

What is the starting value of the variable in `for i in range(4)`?

Write the Python code to create a for loop that iterates a variable called `count` from 3 to 7.

What is the purpose of a trace table in programming?

What does a condition in a program control?

Which of these is an example of a condition?

Write a condition-controlled loop that runs as long as the variable `num` is less than or equal to 10.

logical expression controlling program flow

What is the role of iteration in programming?

For loops

Lesson outcome