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

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