# Product of numeric values

JavaScript, Math · Oct 22, 2020

Calculates the product of two or more numbers/arrays.

- Use
`Array.prototype.reduce()`

to multiply each value with an accumulator, initialized with a value of`1`

.

`const prod = (...arr) => [...arr].reduce((acc, val) => acc * val, 1);`

```
prod(1, 2, 3, 4); // 24
prod(...[1, 2, 3, 4]); // 24
```