Learn to store and manage data with let, const, and var.
Make decisions in your code with if, else, and comparisons.
Repeat actions efficiently with for, while, and for...of.
Create reusable blocks of code that do specific tasks.
Store related data together with key-value pairs.
Meet our train of data! Learn what arrays are and why they're awesome.
Add a new train car to the end of your array train!
Remove the last train car from your array.
Add a new engine at the front of the train!
Remove the first car from the beginning.
Find where a specific item is in your array.
Check if something exists in your array.
Search for items that match a condition.
Copy a portion of your array.
Remove or insert items anywhere in the array.
Transform every item in your array!
Keep only the items you want.