---
title: "Discussion on \"How to Find the Missing Number in an Array\" | Hashnode"
description: "Discussion on \"How to Find the Missing Number in an Array\". Find the missing number in an array with numbers from 1 to N using 4 methods: brute force, hashing, summation and XOR, with details and complexity analysis"
url: "https://hashnode.com/posts/how-to-find-the-missing-number-in-an-array/6675a38a0631e3bbaf526aac"
---

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# [How to Find the Missing Number in an Array](https://blog.masum.dev/how-to-find-the-missing-number-in-an-array?utm_source=hashnode&utm_medium=feed)

Find the missing number in an array with numbers from 1 to N using 4 methods: brute force, hashing, summation and XOR, with details and complexity analysis

Jun 21, 2024 · 7 min read · blog.masum.dev  
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## Written by

[Mahbub Alam Masum](https://hashnode.com/@masum-dev)

@masum-dev · Dhaka, Bangladesh

  
[View profile](https://hashnode.com/@masum-dev)

Computer Science Undergraduate • Aspiring Backend Engineer

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