25-function-parameters

Lesson 25: Function parameters

Default values, rest params, and destructured params.

What you'll learn

• default: function f(x = 10) {}
• rest: function f(...args) {} collects extras into an array
• destructured: function f({ name, age }) {}
• params are positional unless you use an options object

Example

See examples/.

Exercise

Write a range(start, end, step = 1) with a default step.