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 Getting Started With ES2015 Defining Variables With let and const Creating Unchanging Variables With const

Robert O'Toole
Robert O'Toole
6,366 Points

const vs var

does this essentially get rid of the headaches with all that global/local scope stuff?

2 Answers

Steven Parker
Steven Parker
229,921 Points

All variables have scope that depends on where they are declared. But those declared with "var" have function scope, and those declared with "const" or "let" have block scope.

There are other differences as well. See the MDN pages on var, const and let for more details.