randomnumber javascript code example

Example 1: 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
}

Example 2: javascript get random number in range

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

//usage example: getRandomNumberBetween(20,400);

Example 3: generate random number javascript

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

Example 4: get random numbers javascript

//Write the following code to get a random number between 0 and n
Math.floor(Math.random() * n);

Example 5: random int javascript

//Returns random Int between 0 and 2 (included)
Math.floor(Math.random()*3)

Example 6: how to write a program that shows a random number between 1 and 100 in your browser

var randomNum ;
randomNum = Math.ceil(Math.random() * 100);
document.write("Random number between 1 and 100: " + randomNum)