set parameters default code example
Example 1: js default parameter
function greeting (name = 'stranger') {
console.log(`Hello, ${name}!`)
}
greeting('Nick') // Output: Hello, Nick!
greeting() // Output: Hello, stranger!
Example 2: javascript default function parameter value
function multiply(a, b) {
b = (typeof b !== 'undefined') ? b : 1
return a * b
}