How can I have an infinite parameter function in javascript?

Question

I'm not sure of how many arguments to pass to a function and it must do the same functionality irrespective of number of arguments.

for example:

```js
function sum(a,b) {
  return a+b;
}

sum(1,2);
sum(1,2,3,4);
sum(1,2,3,4,5,6);
```

I want to use the same `sum` function to pass any number of arguments. Is there any simple way to do it?

Jahaan · Accepted Answer

ES6 introduced spread operator(...) which does amazing things in Javascript. In this example, it accepts any number of arguments and check the below example for understanding it's usage.

```js
function sum(...args) {
  return args.reduce((a,b)=> a+b);
}

console.log(sum(1,2))

console.log(sum(1,2,3,4))

console.log(sum(1,2,3,4,5,6))

```

How can I have an infinite parameter function in javascript?

1 Answer