generating a random number in javascript code example

Example 1: random int between two numbers javascript

// Between any two numbers
Math.floor(Math.random() * (max - min + 1)) + min;

// Between 0 and max
Math.floor(Math.random() * (max + 1));

// Between 1 and max
Math.floor(Math.random() * max) + 1;

Example 2: random number javascript

/* 
   The Math.random() function returns a floating-point, pseudo-random
   number in the range 0 to less than 1 (inclusive of 0, but not 1)
   with approximately uniform distribution over that range — which you
   can then scale to your desired range. The implementation selects the
   initial seed to the random number generation algorithm; it cannot
   be chosen or reset by the user.
*/
function getRandomInt(max) {
   return Math.floor(Math.random() * Math.floor(max));
}

console.log(getRandomInt(3));
// expected output: 0, 1 or 2

console.log(getRandomInt(1));
// expected output: 0

console.log(Math.random());
// expected output: a number from 0 to <1

Example 3: javascript random number between

Math.floor(Math.random() * 6) + 1

Example 4: javascript generate random number

Math.random();

Example 5: how to generate a random number in javascript

// min value of the random number
var min = 5;

// max value of the random number
var max = 25;

// generate the random number
var rdm = (Math.random() * (max - min)) + min

// generate the random number without "."
var rdm = Math.round((Math.random() * (max - min)) + min)