meet it

A does the same job again and again.

A loop runs the same lines again and again. A for loop is the one to use when you know how many times: run three laps, clap ten times.

Its round brackets hold three parts, split by ;. Where to start, $lap = 1. When to keep going, $lap <= 3. What to do after each go, $lap++, which adds one.

$lap is a : it goes up by one each time round, and you can use it inside the loop. The block in the curly brackets runs once for every go.

<?php
for ($lap = 1; $lap <= 3; $lap++) {
    echo "Lap $lap: run!\n";
}
echo "Finished!\n";

$lap++ is a short way to write $lap = $lap + 1.

guess first

Count the steps. What will this show?

Guess before you run it. Wrong guesses are how you learn, and nothing is marked.

<?php
for ($step = 1; $step < 3; $step++) {
    echo "Step $step\n";
}

your turn

Your turn. Give a round of applause.

Choose how many claps, from 1 to 10, and type it in the first blank. Type a cheer for the end in the second, then run it and count along.

Your code

press run to see what happens

fix it

The frog should go Ribbit, then Splash!, three times. Fix it.

Broken code to fix

press run to see what happens

Run it. Splash! only happens once. Which lines are inside the loop's curly brackets?
Only the lines inside the block repeat. The Splash! line sits after the closing }.
Move the Splash! line up, above the }, and indent it, then press run.

nailed it

your code can repeat itself now. :D

A for loop repeats its block a set number of times.
Where to start, when to keep going, then ++ adds one.
Only lines inside the curly brackets repeat.

new words in your collection

loop
for
counter

This lesson isn’t saved. A free account remembers every lesson you finish.

A for loop does the same job again and again.

Count the steps. What will this show?

Your turn. Give a round of applause.

The frog should go Ribbit, then Splash!, three times. Fix it.

your code can repeat itself now. :D

A does the same job again and again.