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 Introducing ES2015 ES2015 Basics Let and Const

Samuel Kleos
seal-mask
.a{fill-rule:evenodd;}techdegree
Samuel Kleos
Front End Web Development Techdegree Student 13,307 Points
Posted by Samuel Kleos
.a{fill-rule:evenodd;}techdegree
Samuel Kleos
Front End Web Development Techdegree Student 13,307 Points

More detail. . . 🧐 Block level scope?

It is mentioned somewhere on Treehouse that block level scope is either a for-loop, if statement, or function. However does this scope mean that a variable defined in the top level of a function will be accessible inside an if-statement nested within that function? I.e. is ‘block level’ merely a separation between global scope and ‘everything else’?

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You're right that a variable defined in the top level of a function will be accessible inside an if-statement within that function.

But a variable defined within the block of the if-statement would not be accessible from elsewhere in that function.

So the scope of the function is neither global, nor "everything else".