A function is like a factory machine. You give it raw materials (inputs/arguments), it does some work, and hands you back a finished product (output/return value).
Building the machine (writing the code inside the function).
The inputs you pass to the machine when you use it.
The final result the machine gives back to you.
Select a machine, provide inputs, and see what it returns!
function adder(x, y) { return x + y; }\n// Usage let result = adder(5, 3);
Test your function knowledge!