how to use length function in js code example

Example: javascript function length

// The "function length" in JS evaluates to the number of it's params

const sum = (a, b) => a + b;
const log = (s) => console.log(s);
const noop = () => {};

console.log(sum.length);  // 2
console.log(log.length);  // 1
console.log(noop.length); // 0