123456/pt javascript/B3_ryankobus_V4.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
window.onload = starten;
function starten(){
document.getElementById('knop').onclick = kwadraten
}
function kwadraten(){
alert()
for(var i = 20; i <= 20, i--;){
antwoord = i * i
}
alert("Het kwadraat van " + i + " = " + antwoord)
}
</script>
</head>
<body>
<p id="knop">Klik hier!</p>
</body>
</html>
Resultaat
Made by Thijs Aarnoudse