function sum(x = 3, y = 5) {
// return sum
return x + y;
}
console.log(sum(5, 15)); // 20
console.log(sum(7)); // 12
console.log(sum()); // 8function sum(x = 1, y = x, z = x + y) {
console.log( x + y + z );
}
sum(); // 4function sum(x, y = 5) {
// take sum
// the value of y is 5 if not passed
console.log(x + y);
}
sum(5); // 10
sum(5, 15); // 20function say(message='Hi') {
console.log(message);
}
say(); // 'Hi'
say('Hello') // 'Hello'// Default Parameter Values in javascript
// Longhand:
function volume(l, w, h) {
if (w === undefined)
w = 3;
if (h === undefined)
h = 4;
return l * w * h;
}
console.log(volume(2)); //output: 24
// Shorthand:
volume_ = (l, w = 3, h = 4 ) => (l * w * h);
console.log(volume_(2)) //output: 24