js generate random number

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

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

Math.floor(Math.random() * 5)   // print 0 to 5 && 5 not included

# it will give whole random number upto 5.
# you can add your lastIndex at place of (5).
# Math.floor() function returns the largest integer less than or equal to a given number.

Math.random();

Math.floor(Math.random() * 10);     // returns a random 
  integer from 0 to 9
 

var randomNo = Math.floor(Math.rand() * 10000000001);
console.log(randomNo);

//This will generate random number

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

Math.random()

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