Sum of Array Elements in JavaScript using for Loop | Step-by-Step Dry Run (2026)
In this video, you will learn how to find the Sum of All Elements in a JavaScript Array using a for loop. We will use sum += arr[i] to add each element one by one and trace every single iteration in a complete step-by-step dry run.
By the end of this video, you will clearly understand how arr.length controls the loop, how sum gets updated at each step, and how console.log prints the final result.
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📌 WHAT YOU WILL LEARN
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🔢 What is sum of array elements in JavaScript
🔄 How for loop iterates using arr.length
➕ How sum += arr[i] accumulates the total
📦 How array indexing arr[0], arr[1]... works
🧪 Complete dry run — trace sum at every iteration
🖥️ How to print final result using console.log
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🔑 KEYWORDS:
sum of array elements in javascript, javascript array sum using for loop, sum of array javascript, javascript sum += arr[i], array loop javascript beginner, javascript arr.length tutorial, find sum of array javascript, javascript for loop array program, javascript dry run, learn javascript 2026
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