Chained Logic operator inside while loop error javascript

Asked May 08 '15 at 20:35

Active May 08 '15 at 21:25

Viewed 35 times

If either of these two are true, i want to break out of the while loop. If either is not true, i want to re ask the question until they give a true answer. I am getting 'Type Error Cannot read property 'toLowerCase' of null' even though the variable is not null. I tried this in many different ways, cant get it to work. Please help, Thanks!

var newShape = prompt('shape please');

while(newShape.toLowerCase() !== "triangle" || newShape.toLowerCase() !== "square") {

    alert('no');
    newShape = prompt('shape please');

}

This works perfectly fine checking just one logic such as this example;

var newShape = prompt('shape please');

while(newShape.toLowerCase() !== "triangle") {

    alert('no');
    newShape = prompt('shape please');

}

I Would like to be able to add more logical operators

edited May 08 '15 at 21:25

asked May 08 '15 at 20:35

Olivier Medor

Why don't you think `newShape` is `null`? – Jacob Krall May 08 '15 at 20:37
1

"If either of these two are true, i want to break out of the while loop." - nope... think again. – Karoly Horvath May 08 '15 at 20:38
Look at your condition again. Aside from your property problem, this loop will never exit. That condition will always be true. – David Hoelzer May 08 '15 at 20:43
If in the prompt, user writes 'triangle', if that is true, it should stop the while loop since i am checking for a !== right? Please elaborate on your comment. Thanks – Olivier Medor May 08 '15 at 20:46
If the user clicks on the `Cancel` button in the prompt, it returns `null`. – Barmar May 08 '15 at 20:53
They marked my question wrongly as a duplicate and sabotaged my efforts to finding an answer to my question, what a shame smh – Olivier Medor May 13 '15 at 03:20

Chained Logic operator inside while loop error javascript

0 Answers0