how to generate multiple random numbers in javascript code example

Example 1: generate random numbers in js

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

Example 2: javascript generate a random number between two numbers thats not 1

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

Example 3: javascript generate 3 numbers 1 - 49

var arr = [];
while(arr.length < 8){
    var r = Math.floor(Math.random() * 100) + 1;
    if(arr.indexOf(r) === -1) arr.push(r);
}
console.log(arr);