get random number between 400 and 480 in javascript

Question

i am confused about Math.Random() in javascript in know that this function will return a number between 0 and 1

i am trying to return a number between 400 and 500 and what i did is this :

var y = Math.floor((Math.random() * 400) + 100);

but this code may return a value of 100 or 200 what is the best practice to create a number where the minimum is n0 and maximum is n1

Your should take a look at this question : http://stackoverflow.com/questions/1527803/generating-random-numbers-in-javascript-in-a-specific-range — Supamiu, Aug 15 '15 at 11:23
MDN has [example functions that do what you want](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random#Using_Math.random()). — nnnnnn, Aug 15 '15 at 11:25

thumbmunkeys · Answer 1 · 2022-09-23T14:09:11.087

7

try this:

var y = Math.floor((Math.random() * (80 +1)) + 400);

Math.random() * 80 will yield a number between 0 and 80, then just add 400 to it

edited Sep 23 '22 at 14:09

answered Aug 15 '15 at 11:22

thumbmunkeys

1

if he wants to include 480 then your answer must be Math.floor((Math.random() * (80 + 1)) + 400); – M22 Sep 22 '22 at 13:14
1

@M22 you're right - thanks for pointing it out – thumbmunkeys Sep 23 '22 at 14:09

1 Answers1