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 Basics (Retired) Creating Reusable Code with Functions Random Number Challenge, Part II Solution

Fadi Birouti
PLUS
Fadi Birouti
Courses Plus Student 6,711 Points
Posted by Fadi Birouti
Fadi Birouti
Courses Plus Student 6,711 Points

i called throw new Error from other function did't work? any useful idea's

throw new Error didn't' work in console:

/*create randomnumber*/
function getRandomNumber( lower, upper ) { 
 // call function to check if argumetns are numbers// if(checklowerUpper( lower, upper )){}
  else{
  return Math.floor(Math.random() * (upper - lower + 1)) + lower; 
}}

function checklowerUpper( lower, upper ) {
  if (isNaN(lower)|| isNaN(upper)) {throw new Error('error message')}}

console.log( getRandomNumber( 'nine', 24 ) );
console.log( getRandomNumber( 1, 100 ) );
console.log( getRandomNumber( 200, 'five hundred' ) );
console.log( getRandomNumber( 1000, 20000 ) );
console.log( getRandomNumber( 50, 100 ) );

1 Answer

Steven Parker
Steven Parker
231,269 Points
Steven Parker
Steven Parker
231,269 Points

It worked for me.

When I tried your code, It caused the error just as expected. I'm not sure why you would have seen different results.

But there are some issues when the error is not thrown. You call checklowerUpper inside an if expression, but the function checklowerUpper doesn't return any value for the if to test.

Also, when posting code, please use the instructions for code formatting in the Markdown Cheatsheet pop-up below the "Add an Answer" area. :arrow_heading_down: