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 Testing for Number Arguments

Kirok James
seal-mask
.a{fill-rule:evenodd;}techdegree
Kirok James
Full Stack JavaScript Techdegree Student 876 Points
Posted by Kirok James
.a{fill-rule:evenodd;}techdegree
Kirok James
Full Stack JavaScript Techdegree Student 876 Points

What if both values are not a number

How would you do condition when both numbers are in string and would like to test it in console.log? As long as the conditional statement provides only one option it will always be Error with the message "Provide a lower number" only

Thank you for your anwer

function getRandomNumber(lower, upper = 100) { if(isNaN(lower)) { throw Error("Provide a lower number") }else if (isNaN(upper)){ throw Error("Provide a higher number")

}else{

return Math.floor(Math.random() * (upper - lower + 1)) + lower;

} }

console.log( getRandomNumber("five", "six") );

1 Answer

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

You could start with a conditional that tests both values and gives a different message:

  if (isNaN(lower) && isNaN(upper)) {
    throw Error("Provide two numbers");
  } else   //...