Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

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.

Start your free trial

JavaScript JavaScript Functions Arrow Functions Function Challenge Solution

Ken Del Valle
Ken Del Valle
976 Points
Posted by Ken Del Valle
Ken Del Valle
976 Points

Someone please help with this alternative

This is what I have

alert('Welcome to Randomize!');

var lowerNumber = parseInt(prompt("Type your lowest number."));
var upperNumber = parseInt(prompt("Type your highest number."));

if (lowerNumber < upperNumber) {
function randomNumber(lowerNumber, upperNumber) {
    return Math.floor(Math.random() * (upperNumber - lowerNumber + 1)) + lowerNumber;
}

  } else {
    console.log('It did not work!')
}
confirm(randomNumber());

Can someone help me with this? I want to use prompts to determine the two numbers.

2 Answers

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

The prompts appear to be working fine, but there are other aspects of this code that will cause errors (or are odd):

  • if the numbers are given in the wrong order, the function isn't defined but an attempt to call it is still made
  • even when the function is defined, the call doesn't provide it with any arguments (it needs 2)
  • "confirm" should only be used instead of "alert" when the response will be tested
Adam Suchorzebski
Adam Suchorzebski
7,600 Points
Adam Suchorzebski
Adam Suchorzebski
7,600 Points

Hi Ken,

I'm beginner when it comes to coding, but that's how I'd do it:

alert('Welcome to Randomize!');

var lowerNumber = parseInt(prompt("Type your lowest number."));
var upperNumber = parseInt(prompt("Type your highest number."));


function randomNumber(lowerNumber, upperNumber) {
return Math.floor(Math.random() * (upperNumber - lowerNumber + 1)) + lowerNumber;
}  

if (lowerNumber < upperNumber) {
console.log( randomNumber(lowerNumber, upperNumber) );
}
else {
    console.log('It did not work!')
}

So here we have 2 variables in the global scope, which are the outcome of user's input.

Then there's a conditional statement that checks whether the upperNumber variable is a higher number than lowerNumber. If it's true, then it calls the function, gets back to it, executes the code and returns with the value that is printed in the console. If the condition of the statment is not met - the upperNumber is not higher than lowerNumber then it returns with console.log 'It did not work!'

I'm not really sure what that confirm at the end is for. Basically as far as I'm aware, it's something you put into conditional statement.