Computer Science

checking that data is acceptable by comparing it against a set of criteria

when a program suddenly stops working and closes unexpectedly, often due to an error it cannot recover from

Validating data input in a program

While loops

Using trace tables

For loops

Nested loops

Randomisation

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

checking data is acceptable by comparing it against a set of criteria

when a program stops functioning and exits unexpectedly

Which of the following is an example of validation?

the program automatically asks for valid data

the program runs with invalid data and may crash

the program fixes the invalid data automatically

What happens if a program does not explicitly include instructions to handle invalid data?

Arrange the steps to validate user input:

What type of loop is commonly used for validation?

to inform the user that input is incorrect

What is the purpose of a validation error message?

a file that contains pre-made code you can use in your programs

Which module is used to generate unpredictable numbers in Python?

What type of loop is typically used for repeating until data is valid?

Which function is used to convert user input to an integer?

What command is used to bring a module into your Python program?

Validating data input in a program

Lesson outcome