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

Posted by Palash Tiwari
Palash Tiwari
8,050 Points

can you please tell me why the curly braces { not closed after ' if 'statement .

function getRandomNumber(lower, upper = 100 ) { if (isNan(lower) || isNAN(upper) ) { throw Error('Both arguments must be numbers');

}

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

}

2 Answers

Rick Gleitz
Rick Gleitz
47,878 Points
Rick Gleitz
Rick Gleitz
47,878 Points

Hi Palash,

They are actually closed; if you indent to make it easier to read, you can see it (two opens and two closes, one set for the function and one set for the if statement). Note: I copied your code and simply reformatted it without adding anything:

function getRandomNumber(lower, upper = 100 ) { 
  if (isNan(lower) || isNAN(upper) ) { 
    throw Error('Both arguments must be numbers');
  }
  return Math.floor(Math.random() * (upper - lower + 1)) + lower;
}

Hope this helps!

Palash Tiwari
Palash Tiwari
8,050 Points
Palash Tiwari
Palash Tiwari
8,050 Points

Thank you sir i got it :)