How to repeat loop in javascript

JavaScript
1

I want to make a quiz app that requires a repeated loop

var first = "a", last = "c";
for(var i = first.charCodeAt(0); i <= last.charCodeAt(0); i++) {
	console.log( eval("String.fromCharCode(" + i + ")") + " " );
}

this code will output a b c in terminal so, I want to make it repeated till like 15 seconds.

// so it will be outputted like
a
b
c
a
b
c
... so on till 15sec

how to do it in JS? Do I have to return something? What should I return?

3

It its like 60 times,

5

yes maybe the output its like these

a
b
c
a
c
... till 60 times

but how to do it?

7

I just make my argument in function so I can call it repeatedly but your code is more bet practice i think :slight_smile:

Hmmm, nice and thanks it’s work now. I even don’t think that way to solve this problem.

Again, thanks a lot.

8

A slightly more streamlined version which is slightly more flexible:

const displayLetters = (first, last) => {
	let str = '';
	for (let i = first.charCodeAt(); i <= last.charCodeAt(); i++)
		str += String.fromCharCode(i) + ' ';
	console.log(str + '\n');
};

const repeatDisplay = (firstLetter, lastLetter, numRepeats, totalTime) => {
	const delay = totalTime / numRepeats;
	for (let count = 1; count <= numRepeats; count++)
		setTimeout(displayLetters, delay * count, firstLetter, lastLetter);
};

repeatDisplay('a', 'c', 60, 15000); // 60 repeats in 15 seconds

Creating a function like repeatDisplay like above allows you to specify the number of repeats and total time (in milliseconds) to display the repeats without out having to manually figure out the correct milliseconds to put in for the delay, if you decide to change your mind about how many repeats should show in a specific amount of time.

1 Like