Find Largest Number in an Array in JavaScript | for Loop + Dry Run Explained (2026)
In this video, you will learn how to Find the Maximum Number in a Given Array in JavaScript using a for loop. We initialize max = arr[0], then compare every element using arr[i] greater than max and update max whenever a larger value is found.
A complete step-by-step dry run is included where we trace arr = [17, 73, 36, 92, 62] iteration by iteration — including console.log inside and outside the loop — so you understand exactly what is printed at each step.
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📌 WHAT YOU WILL LEARN
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🔢 How to find the largest number in a JavaScript array
📋 Why max = arr[0] is the correct initialization
🔄 How for loop iterates using arr.length
✅ How arr[i] greater than max updates the maximum value
🧪 Complete dry run — trace max at every iteration
🖥️ Difference between console.log inside vs outside loop
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🔑 KEYWORDS:
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