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 Loops Simplify Repetitive Tasks with Loops Create a do...while loop

Why do we need a "let" function to do loops

let secret; do { secret = prompt("What is the secret password?"); } while (secret !== 'sesame');

1 Answer

Jonathan Grieve
MOD
Jonathan Grieve
Treehouse Moderator 91,253 Points

You could probably get away with using var keywords but the reason we use let rather than const is because once variables are defined in const keywords the values in them cannot be changed.

So in this code let is not a function It's keyword that defines scope and capabilities of the variable you're using. :-)

Thank you, Jonathan