Add prod

snippets/prod.md

@@ -0,0 +1,17 @@
+---
+title: prod
+tags: math,array,intermediate
+---
+
+Returns 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`.
+
+```js
+const prod = (...arr) => [...arr].reduce((acc, val) => acc * val, 1);
+```
+
+```js
+prod(1, 2, 3, 4); // 24
+prod(...[1, 2, 3, 4]); // 24
+```