Loops (repeating actions) in Intro to Computing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a loop in programming?

A loop is a way to repeat a set of instructions multiple times until a condition is met, like doing the same chore over and over until it's done.

beginner

Name two common types of loops.

Two common loops are:<br>1. For loop: repeats a set number of times.<br>2. While loop: repeats while a condition is true.

intermediate

What happens if a loop's condition never becomes false?

The loop runs forever, called an infinite loop. It's like a chore that never ends and can freeze a program.

beginner

Explain a real-life example of a loop.

Imagine washing dishes: you wash one dish, then the next, and keep going until no dishes are left. This is like a loop repeating an action until a condition (no dishes) is met.

beginner

What is the purpose of a loop counter?

A loop counter keeps track of how many times the loop has run, helping to stop the loop after a set number of repeats.

Which loop repeats a fixed number of times?

A For loop

B While loop

C If statement

D Switch case

A for loop repeats a set number of times, like counting from 1 to 5.

What is an infinite loop?

A A loop that never stops

B A loop that runs once

C A loop that counts to zero

D A loop that skips steps

An infinite loop keeps running because its stop condition is never met.

Which part of a loop decides when to stop?

A Counter

B Function

C Variable

D Condition

The condition is checked each time to decide if the loop should continue or stop.

What does a loop counter do?

A Changes the loop condition

B Counts how many times the loop runs

C Stops the program

D Starts the loop

The counter tracks the number of repetitions to help control the loop.

Which loop type repeats while a condition is true?

A Do-while loop

B For loop

C While loop

D Switch loop

A while loop continues as long as its condition remains true.

Describe how a loop works using a real-life example.

Think about doing the same task repeatedly until something changes.

Explain the difference between a for loop and a while loop.

One counts repeats, the other checks a condition each time.