freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-with-javascript/index.md

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title: Generate Random Whole Numbers with JavaScript

Generate Random Whole Numbers with JavaScript

Here’s the setup:

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

function randomWholeNum() {

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

We need to use Math.floor() with Math.random() to generate and return a random whole number between 0 and 9. Putting Math.floor() and Math.random() together, this is what our code looks like:

Math.floor(Math.random() * 10);

And we need change the value of return:

return Math.floor(Math.random());

Here’s a full solution:

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

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