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Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today. # 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);

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));
```

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;`