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 Working with Strings Combine and Manipulate Strings

How do I answer this question correctly?

app.js
let firstName = "Callie";
let lastName = "Crownover";
let role = "developer";
let msg = firstName '' + lastName + ':' + role;

Below role, create a new variable named msg that combines the firstName, lastName and role variables to create a string like "Carlos Salgado: developer".

HINT: Pay close attention to the spaces in the string.

it keeps giving me a response of "Bummer: Cannot read property '1' of null".... I've tried 7 ways to Sunday and I can't seem to figure out how to fix it?

3 Answers

Steven Parker
Steven Parker
231,269 Points

I see 3 issues:

  • there should be a + operator between "firstName" and the quoted string
  • the first quoted string should have a space in it
  • the second quoted string should have a space after the colon

Wow, you made that seem so simple. Thank you!

let firstName = "Anwar";
let lastName ="Haq";
let role = 'developer'

let msg = firstName + ' ' + lastName + ': '+ role;

Thanks!!!

let msg = firstName + ' ' + lastName + ':' + role + '.';