JavaScript Array.prototype.reduce() Guide

Array.prototype.reduce() – Iterates left‑to‑right, combining elements into a **single accumulator value**.

👉 Syntax

const result = array.reduce((accumulator, current, index, array) => {
  return /* next accumulator */;
}, initialValue);

🧪 Example

const nums=[1,2,3];
const sum=nums.reduce((a,b)=>a+b,0);
console.log(sum); // 6