แก้ไขโค้ด:
เห็นผล »
ลองตัวเอง - ©
w3ii.com
<!DOCTYPE html> <html> <body> <p>Click the button to return the absolute value of different numbers.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var a = Math.abs(7.25); var b = Math.abs(-7.25); var c = Math.abs(null); var d = Math.abs("Hello"); var e = Math.abs(2+3); var x = a + "<br>" + b + "<br>" + c + "<br>" + d + "<br>" + e; document.getElementById("demo").innerHTML = x; } </script> </body> </html>