[ ] and { }
The [ ] of arrays and lists, and the { } of blocks and dictionaries.
Put your fingers on the home position (F and J) and press Space to start
nums = [1, 2, 3] first = nums[0] last = nums[-1] matrix = [[1, 2], [3, 4]] user = {"id": 7, "name": "Ken"} user["age"] = 30 int[] scores = {80, 92, 75}; if (ok) { } const point = { x: 3, y: 4 }; const [a, b] = pair; const { id, name } = user;