JAVASCRIPT

how to generate a random number in javascript

//To genereate a number between 0-1
Math.random();
//To generate a number that is a whole number rounded down
Math.floor(Math.random())
/*To generate a number that is a whole number rounded down between
1 and 10 */
Math.floor(Math.random() * 10) + 1 //the + 1 makes it so its not 0.

math.random javascript

Math.random() 
// will return a number between 0 and 1, you can then time it up to get larger numbers.
//When using bigger numbers remember to use Math.floor if you want it to be a integer
Math.floor(Math.random() * 10) // Will return a integer between 0 and 9
Math.floor(Math.random() * 11) // Will return a integer between 0 and 10

// You can make functions aswell 
function randomNum(min, max) {
	return Math.floor(Math.random() * (max - min)) + min; // You can remove the Math.floor if you don't want it to be an integer
}

generate random number javascript

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

generate random numbers in js

Math.floor((Math.random() * 100) + 1);
//Generate random numbers between 1 and 100
//Math.random generates [0,1)

js random number

var random;
var max = 8
function findRandom() {
  random = Math.floor(Math.random() * max) //Finds number between 0 - max
  console.log(random)
}
findRandom()

random number generator javascript

Math.floor(Math.random() * (max - min + 1)) + min;
//max is the highest number you want it to get
//min is the lowest number you want it to get

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

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)

js generate random number

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

random number javascript

function getRandomNumberBetween(min,max){
    return Math.floor(Math.random()*(max-min+1)+min);
}
getRandomNumberBetween(50,80);

JS random number

Math.random() 


// Or something between 0 and 9:
Math.floor(Math.random() * 10)

// You can even make functions:
function random(min, max){return Math.floor(Math.random() * (max - min)) + min}

javascript random number

// 0 -> 10
Math.floor(Math.random() * 11);

// 1 -> 10
Math.floor(Math.random() * 10) + 1;

// 5 -> 20
Math.floor(Math.random() * 16) + 5;

// -10 -> (-2)
Math.floor(Math.random() * 9) - 10;

generate random number js

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

math.random javascript

Math.random() // Returns number from 0 to 1. 

Math.floor(Math.random() * max) // Return number from 0 to max minus 1
// Example
Math.floor(Math.random() * 10) // Return number from 0 to 9
// Add a +1 to return a number from 0 to max
Math.floor(Math.random() * 10) + 1 // Returns Number from 1 to 10
// To have a min and max 
Math.floor(Math.random() * (max - min)) + min
// Example
Math.floor(Math.random() * (20 - 10)) + 10

javascript random numbers

let randomNum = Math.floor(Math.random() * 5)

return( 0 or 1 or 2 or 3 or 4)

let randomNum = Math.floor(Math.random() * 5) + 1

return( 1 or 2 or 3 or 4)

// * 5 in this code meaning a number between 0 and 4 

random numbers javascript

Math.floor(Math.random() * 100);     // returns a 
  random integer from 0 to 99

javascript math.random

/*
`Math.random` returns a pseudo-random number between 0 and 1.
a pseudo-random number is generated by an algorithm, it is not
technically actually random, but for all intents and purposes
it is random enough that no human should be able to find a
pattern
*/

Math.random(); // -> Decimal number between 0 and 1

Math.round(Math.random()); // -> 0 or 1

Math.random() * max; // -> Decimal number between 0 and max

Math.floor(Math.random() * max); // -> Whole number between 0 and max - 1

Math.round(Math.random() * max); // -> Whole number between 0 and max

Math.ceil(Math.random() * max); // -> Whole number between 1 and max

(Math.random() * (max - min)) + min; // Decimal number between min and max

Math.floor((Math.random() * (max - min)) + min); // Whole number between min and max - 1

Math.round((Math.random() * (max - min)) + min); // Whole number between min and max

Math.ceil((Math.random() * (max - min)) + min); // Whole number between min + 1 and max

Math.random() * Math.random(); // Decimal number between 0 and 1 with a tendency to be smaller

1 - Math.random() * Math.random(); // Decimal number between 0 and 1 with a tendency to be larger

js random number

const rndInt = Math.floor(Math.random() * 6) + 1

javascript random number

function random(number) {
  return Math.floor(Math.random()*number);
}

generating random number in javascript

/*
To generate a random number between a and b keep in mind this formula:
a-> minimum value 
b->maximum value */
let randomNumber = a+(b-a)*Math.random();
/*this gives you any random number between a and b
*/

how to use math.random()

local number = math.random(1, 10)
# change 1 to be the smallest possible number
# change 10 to the be the biggest possible number

javascript random

function random(min, max) {
  return ~~(Math.random() * (max - min + 1) + min);
}
random(1, 5);

javascript generate random number

Math.random();

random number javascript

function randomNumberGeneratorInRange(rangeStart, rangeEnd) {
   return Math.floor(Math.random() * (rangeStart - rangeEnd + 1) + rangeEnd);
}

console.log(`My random number: ${randomNumberGeneratorInRange(10, 50)}`);

math random js

function getRandomIntInclusive(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min + 1)) + min; // max & min both included 
}

javascript random number

Math.floor(Math.random() * 10) // Will return a integer between 0 and 9
Math.floor(Math.random() * 11) // Will return a integer between 0 and 10

random number javascript

var randomNumberBetween0and19 = Math.floor(Math.random() * 20);

function randomWholeNum() {
  // Only change code below this line.
  return Math.floor(Math.random() * 10);
}

js random

function randint(low:number, max?:number) {
  return Math.floor(Math.random() * 10) % (max ?? low) + (max ? low : 0);
}

generate random number js

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

random function in javascript

function getRandom() {
  return Math.random();
}

js random number

// You can make functions aswell 
function randomNum(min, max) {
	return Math.floor(Math.random() * (max - min)) + min; // You can remove the Math.floor if you don't want it to be an integer
}

js random generator

var options = ["Your options", "Another option!", "This is an option."];
var chosenOption = Math.floor(Math.random() * options.length);
console.log(options[option]);

js random

Math.floor(Math.random() * 10) + 1 // Random number Between 1 and 10
// First Math.random give us a random number between 0 and 0,99999
// The we multiply it by 10
// And we round dow with Math.floor
// We add 1 so the result will never be 0 

// Another Example:
h.floor(Math.random() * 20) + 10 // Random number Between 10 and 20

javascript random number

//returns a random number between 1 and maxNumber
//replace Math.ceil with Math.round if you want to include 0 as well
const randomNumber = (maxNumber) => { 
	return Math.ceil(Math.random() * maxNumber);
}

random function javascript

let object = random(0, 50);
// making "object" a random number between 0 and 50.

console.log(object);
// printing object in the console

random number javascript

// The below code executes 0-100, I have used es6 arrow function concept
setInterval(() => console.log(Math.floor(Math.random()*101)),1000);

js random number

const random = 'abcdefghijklmnopqrstuvwxyz123456789'
const size = 8
let code = ""

for(let i = 1; i < size; i++) {
   code += random[Math.abs(Math.floor(Math.random() * random.length))]
}

console.log(code.toUpperCase())

js math random

var n = Math.random();
n = Math.floor((n * 6) + 1); // if you want your numbers to start at 1 and end at 6 
console.log(n);

function to generate random number in javascript

function random(number){
    return Math.floor(Math.random()*number);;
}

math random javascript

// Retorna un número aleatorio entre min (incluido) y max (excluido)
function getRandomArbitrary(min, max) {
  return Math.random() * (max - min) + min;
}

js random

Math.floor(Math.random() * 900000)

javascript generate random number

let rand = Math.random(); //between (0 <= rand < 1)
let rand2 =  Math.random() * 100; // (0 <= rand2 < 100)

random number in js

Math.random() returns a random number in [0,1)

javascript random number

function randomnumber(){
	return Math.floor(Math.random())
}

js random

// using array and random example
function getTheBill() {
  let names = ["bob", "mike", "matt"];

  let randomFriend = Math.floor(Math.random() * names.length);

  let randomFriendBuyng = names[randomFriend];

  return randomFriendBuyng + " is buying us lunch today!";
}

random number javascript

function uniqueNumber(count) {
  let defaultNumber = 4413277523420
  let convertToArray = defaultNumber.toString().split("")
  let sliceNumber = convertToArray.slice(0, count)
  let randomNumber = Math.floor((Math.random() * +sliceNumber.join("")));
  
  if  (randomNumber.toString().split("").length < count) {
      randomNumber = Math.abs(randomNumber - +sliceNumber.join(""))
  }
 
  return randomNumber
}

js random

function randint(low, max) {
  return Math.round(Math.random() * 10) % (max ?? low) + (max ? low : 0);
}

random math js

(Math.random()*100).toFixed(0)

javascript random number

Math.random() * 10 = 0-10

define math.random() method in javascript

// Math.random()

// The Math.random() function returns a floating-point, pseudo-random number that's greater than or equal to 0 and less than 1, with approximately uniform distribution over that range — which you can then scale to your desired range.
// parameter inside Math.random () is scale to desired range.

// EXAMPLE :1 
let ran_num = Math.random();
console.log(ran_num);
// OUTPUT: It gives any floating point number between 0 to 1 on every refresh of code like:
// 0.439905306460564
// 0.24377528882567256
// 0.5522415279920441  etc...... 

// EXAMPLE :2 
let ran_num_2 = (Math.random() * 10) ;
console.log(ran_num_2);
// OUTPUT: It gives any floating point number between 0 to 10 on every refresh of code like:
// 0.6199449585914163
// 2.532543541582639
// 1.9219543257575755  etc...... 

// EXAMPLE :1 
let ran_num_3 = Math.floor(Math.random() * 10) ;
console.log(ran_num_3);
// OUTPUT: It gives any floating point number between 0 to 10 and in integer(WITH OUT DECIMAL POINT) on every refresh of code like:
// 4
// 9
// 1 etc...... 

javascript random numbers

var array = ["one", "two", "three", "four", "five"],
    result = array.slice(0, 3).map(function () { 
        return this.splice(Math.floor(Math.random() * this.length), 1)[0];
    }, array.slice());

console.log(result);
 Run code snippet

What does Math.random() do?

it generates a random number between 0 and 1 (not inclusive of 1)

generate random number javascript

// generates random float between 0-1
Math.random()