How to print 20 random number numbers in JavaScript. Below code is not giving desired results.

Question

///
for (var i = 0; i < 20; i++)
{
Math.random();
}
///
//this is printing just one number instead of 20 random numbers.

Answer 1

for (var i = 1; i < 20; i++)
{
alert(Math.floor(Math.random() * 20) + 1);
}

Answer 2

// random numbers from 1 to 20 (non-repeat ver)

var nums = [];
for (var i = 0; i < 20; i++)
{
do {
num = (Math.floor(Math.random() * 20) + 1);
} while (nums.indexOf(num)!=-1)
nums.push(num);
}

console.log(nums);

Answer 3

If you want really random numbers, you should include the time and date function to calculate the results. If you do not, it will never be a real random result and you will receive an exact copy of a previous batch of numbers that you generated. Believe me when I say, I was facing the same dilemma about 30 years ago and could not find another solution for this dilemma. Hope that you figure it out and try my suggestion. Keep in touch...

Answer 4

Got it.
Code
console.log(Math.random());
is giving desired result.