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

an expression that evaluates to True or False

a signal that is used to let a program know whether a condition has been met or not

Iteration using while loops

Computing

This unit introduces pupils to text-based programming with Python. Pupils start with programs involving input and output, and gradually move on to using arithmetic operations, randomness, selection, and iteration. Pupils will consolidate these skills in a project at the end of the unit.

Introduction to Python programming

repeating a set of instructions multiple times

What does 'iteration' mean in programming?

to indicate whether a specific condition has been met

What is the purpose of a flag in programming?

What while loop should you use if you want a block of code to run forever? 

In Python, which of the following is a way to create a flag variable named `is_game_over` and set its initial value to `False`?

What is treasure_found in this code?
```distance_traveled = 0
treasure_found = False

while treasure_found == False:
    print(f"Keep going {distance_traveled} steps travelled so far")```

A program calculates a theme park ticket price by first checking the users age and then checking if it is peak season or not. Which of the following is used in the program?

Match the relational operator to it's description.

What will be the output of the following Python code?

```score = 50

if score >= 80:
    print("Win")
elif grade >= 50:
   print("Try again")
else:
    print("You lose")```

Nested `if` statements allow you to make more complex decisions within your code

You can only have one level of nesting in Python.

Nested `if `statements execute all code blocks, regardless of the condition.

Indentation is not important when using nested `if` statements.

Which of the following statements about nested if statements is true?

A school organises students based on age. Students 11-16 attend High School, and students 16-18 Sixth Form. Which expression correctly checks if a student's age falls within the High School range?

This lesson will be removed by end of Summer Term 2025.

Iteration using while loops

Lesson outcome

This lesson will be removed by end of Summer Term 2025.