Build a Blockchain Block in Code | Block Number, Hash & Previous Hash Explained (2026)

In this short tutorial, I demonstrate how a blockchain block works internally using simple code.

We cover:
• Block Number
• Block Data
• Hash Generation
• Previous Hash Concept
• How blocks are linked together

This is a beginner-friendly explanation of blockchain structure and how each block maintains data integrity through cryptographic hashing.

If you want to understand Web3, Smart Contracts, and Blockchain development, this is the first concept you must learn.

Update

Steve Rich's Exciting New Book: A Journey into the World of Forex Trading!

Interview

Perfect for:
– Beginners in Blockchain
– Web3 Developers
– Coding Students
– Interview Preparation

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