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![](https://ecs-static.teamtreehouse.com/assets/views/marketing/shared/community-banner-white-47072046c51352fe6a69f5e691ff5700b28bb11d45197d7bdf066d9ea3f72d0c.webp)
![William Burke](https://secure.gravatar.com/avatar/7f0c8ae87bfeb3d8eca7d8f0a80df866?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
William Burke
1,253 PointsI'm totally lost. My understanding is that increment means to add and decrement means to subtract. so -= means what?
The entire problem solving process isn't explained very well. is there cheat sheet I can go by?
2 Answers
William Li
Courses Plus Student 26,868 Pointsvar1 -= 3
// same as
var1 = var1 - 3 // decrement var1 by 3
![William Burke](https://secure.gravatar.com/avatar/7f0c8ae87bfeb3d8eca7d8f0a80df866?s=96&d=https%3A%2F%2Fecs-static.teamtreehouse.com%2Fassets%2Fcontent%2Fdefault_avatar-445fbbabfc8dc9188fb5967fe43322ee0c3e0dd1e10f378bf8343784af5a13eb.webp&r=pg)
William Burke
1,253 PointsThanks dude!