I'm looking for a way to generate a random number that is divisible by 10, such as 10, 20, 30, 40, 50 and so on…

How could I acplish this in JavaScript?

I'm looking for a way to generate a random number that is divisible by 10, such as 10, 20, 30, 40, 50 and so on…

How could I acplish this in JavaScript?

• javascript
• random

• 2 Base 10 is pretty mon. I am sure that's not what you mean by 10, 20, 30, 40, 50. – user2591612 Commented Feb 24, 2014 at 18:58

1 Answer 1

Calculate an integer random number between 1 and 5, and multiply it by 10.

There are lots of tutorials out there on how to acplish the first task. E.g., use

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min);
}

(Taken from Math.random() documentation on MDN.)

And, as said, multiply the result by 10 … that's it.

So, a plete example might be:

function getRandom10() {
  return getRandomInt(1, 5) * 10; // Returns 10, 20, 30, 40 or 50
}

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min);
}

If you need to configure this, use:

function getRandom10(min, max) {
  return getRandomInt(min / 10, max / 10) * 10;
}

And call it like:

getRandom10(30, 70); // => 30, 40, 50, 60 , 70