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JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Random Number Challenge

Posted by Christopher Altamirano
Christopher Altamirano
2,414 Points

Is this good? I was confused so i looked at other answers for inspiration.

var min = parseInt(prompt("Enter min number first")); var max = parseInt(prompt("Enter max numb now"));

function randoNum(min, max) { var random = Math.floor(Math.random() * (max - min + 1)) + min; return document.write("your random number is - " + random); }

randoNum(min, max);

1 Answer

KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points
KRIS NIKOLAISEN
KRIS NIKOLAISEN
54,972 Points

document.write() doesn't return anything so your function doesn't return anything so it is kind of an odd choice for a return statement. It makes more sense to me that your function would return variable random with document.write() coming after the function like this:

var min = parseInt(prompt("Enter min number first"));
var max = parseInt(prompt("Enter max numb now"));

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

document.write("your random number is - " + randoNum(min, max));
Diego Alvarez
Diego Alvarez
6,680 Points

Could you tell why is it necessary to add +1 please? Or why this formula works like this, kinda complicated.

Math.floor(Math.random() * (max - min + 1)) + min;