default function parameters syntax code example

Example 1: javascript default parameters

function multiply(a, b = 1) {
  return a * b;
}

Example 2: js default parameter

function read_file(file, default_param = false) {
  // Code
}

Example 3: js default parameter

function greeting (name = 'stranger') {
  console.log(`Hello, ${name}!`)
}

greeting('Nick') // Output: Hello, Nick!
greeting() // Output: Hello, stranger!