What is a loop in coding?

An instruction that repeats a set of steps, either a fixed number of times or until a condition changes. It avoids writing the same instructions repeatedly.

What is an infinite loop?

A loop with no way to stop, so it repeats forever. It is a common bug, and discussing it helps children understand why a stopping condition matters.

How do loops relate to patterns?

Directly. Spotting that something repeats is what tells you a loop can be used, which is why pattern recognition is usually taught before loops.

Loops & Repetition | Coding & Logic

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🔄Loops & Repetition

Repeating steps efficiently

🔄

Loops: Repeating Steps Efficiently

Key Points

A LOOP repeats a set of instructions many times without having to write them out repeatedly
FOR loop: repeats a known number of times — 'FOR i = 1 TO 10: print i' prints numbers 1–10
WHILE loop: repeats AS LONG AS something is true — 'WHILE hungry: eat food'
Loops are one of the most powerful tools in coding — they handle huge tasks in just a few lines!

📘 Examples

❓ How many times does this run? FOR i = 1 TO 5: print 'hello'

✅ 5 times! It prints 'hello' once for i=1, once for i=2, all the way to i=5!

❓ A robot claps 10 times. How would you use a loop?

✅ REPEAT 10 TIMES: clap. Just 2 lines of code instead of writing 'clap' 10 times!

❓ What's the difference between a FOR loop and a WHILE loop?

✅ A FOR loop repeats a specific number of times. A WHILE loop repeats as long as a condition is true — you might not know how many times it will run!

🌟 Fun Fact!

The first computer 'bug' was a REAL insect! In 1947, Grace Hopper's team found a moth stuck in a Harvard computer relay causing errors. They taped it in their logbook and wrote 'First actual case of bug being found'. 🐛

A loop repeats instructions rather than writing them out again and again. It is the point where children usually see why programming is powerful, because a loop does the same work in a fraction of the writing.

Loops connect directly to pattern recognition. Spotting that something repeats is what tells you a loop is possible, which is why patterns are taught first.

Ideas to build

That a loop repeats a set of instructions a number of times or until a condition changes.
That loops make programs shorter and easier to change, since you edit one place rather than many.
That a loop needs a way to stop, or it runs forever.
That loops can contain other loops, which is how grids and patterns are produced.

Things to do at home

Give an instruction like repeat four times: walk forward and turn right, and see the child trace a square.
Write out a repetitive task the long way and then rewrite it as a loop, comparing the length.
Find loops in everyday life: choruses in songs, stitches in knitting, laps of a track.
Deliberately write a loop with no stopping condition and discuss what would happen.

Frequently asked questions

What is a loop in coding?: An instruction that repeats a set of steps, either a fixed number of times or until a condition changes. It avoids writing the same instructions repeatedly.
What is an infinite loop?: A loop with no way to stop, so it repeats forever. It is a common bug, and discussing it helps children understand why a stopping condition matters.
How do loops relate to patterns?: Directly. Spotting that something repeats is what tells you a loop can be used, which is why pattern recognition is usually taught before loops.