How to get a random number in a given interval in JavaScript

Task: you need to write a JavaScript function selfrandom(a,b:int):int that returns a random number in the interval from a to b for example: selfrandom(12,396); returns 254

Author: Qwertiy, 2011-12-31
Source

2 answers

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

Source: Javascript Reference: Math. random

 4
Author: Spectre, 2011-12-31 11:09:29

Random number from 0 to 1: Math.random()

Rounding a number:

  1. Up to more: Math.round( 1.1 ) = 2
  2. To the nearest one: Math.ceil( 1.5 ) = 2, Math.ceil( 1.1 ) = 1
  3. Up to less than Math.floor( 1.9 ) = 1 or ~~( 1.9 ) = 1

Declaring a function of 2 variables:

function my_fn ( a, b ){
  var res = 0;
  //действия
  return res;
}
 0
Author: timka_s, 2011-12-31 11:08:57