Computer Science

breaking down a problem into smaller parts to make the task more manageable

a loop that checks its condition at the start before any code inside the loop is run

a loop that runs its code first, then checks the condition at the end to decide if it should repeat

Programming project: iteration I

While loops

Using trace tables

For loops

Nested loops

Randomisation

Validating data input in a program

Designing robust programs

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

the purpose and requirements of the program

When you are designing a program, what does a project brief provide?

What term describes breaking a problem into smaller, more manageable parts in programming?

Correctly order the steps in a pre-condition loop’s execution:

What is used to visually represent the logical flow of a program, including actions, decisions and outcomes?

It ensures that the flowchart is visually appealing.

It ensures that the flowchart reflects the program's purpose and requirements.

It reduces the time needed to draw the flowchart.

It allows the flowchart to include extra features not required by the program.

Why is it necessary to follow the project brief for a program when designing the program's flowchart?

breaking down a problem into smaller, manageable parts

a loop that checks its condition at the start before running the code

a loop that runs its code first, then checks the condition

ensuring that input data is correct and appropriate

a program that handles errors or unexpected inputs without crashing

Match each keyword to its correct definition or description:

What does it mean for a program to be robust?

Which of the following is an example of exception handling?

It prevents the program from crashing due to errors.

Why is exception handling important in programming?

Which keyword is used in Python to handle exceptions?

providing unexpected inputs to see how the program handles them

What is a common method to test the robustness of a program?

What Python statement is used to handle a specific exception, such as a value error?

Programming project: iteration I

Lesson outcome