Syntax, static semantics, and runtime semantics — three reasons your program can fail, only one of which the interpreter catches before you run it.
Short drills on what this video just taught. Write the code, run the checks, and reveal the answer only if you are stuck.
The video introduced an operator that takes a string on one side and a number on the other and produces a longer string of repeated copies.
The primitives "hi" and 5 are given as text and copies. Build the five-copy string and assign it to laugh.