Welcome to Blockchain Tutorial 16 in our Solidity Mastery Series 2025!
In today’s video, we dive deep into Structs in Solidity — the MOST powerful way to create custom data types inside Smart Contracts.

This lecture includes theory + real implementation on Remix IDE with clear examples for absolute beginners.

What You Will Learn in This Video:
What are Structs in Solidity?
– Custom data type
– Group multiple fields together
– Similar to objects, classes, JSON, or records
– Used in 90% of real-world smart contracts

Real-World Examples:
Student → name, age, marks
Product → id, price, quantity
Voter → CNIC, voted, candidateID
NFT → owner, metadata, price

Complete Practical Implementation (Remix IDE)
Creating a Struct (Student)
struct Student {
string name;
uint age;
uint marks;
}

Storing One Student:
– Using student1
– Using constructor-like format
– Using set function

Dynamic Array of Structs:
– Student[] public students;
– Add multiple students
– Retrieve student details by index

Why Structs Are So Important:
– Used in ERC721 NFTs
– Used in DAOs, Voting Systems, Marketplace Orders
– Best way to manage large organized data
– Extremely flexible and gas-efficient

Part of Phase 2 in our Blockchain → Solidity → Web3 Roadmap
Don’t just code — build enterprise-level Smart Contracts!

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Source Code:
https://github.com/farzeen-ali/Blockchain-Solidity

Blockchain Lectures (GitHub Notes):
https://github.com/farzeen-ali/Blockchain-Lectures

Blockchain Full Course 2025 (Playlist):
https://www.youtube.com/playlist?list=PL5OhSdfH4uDvKfoYd1GRf5KCu7kvgYSw_

Cyber Security Full Course 2025:
https://www.youtube.com/playlist?list=PL5OhSdfH4uDuCcQ-NZ4lYa3S07FQTFtrY

DevOps Tutorial 2025:
https://www.youtube.com/playlist?list=PL5OhSdfH4uDsyUM02ZHl2mOYBpihCYsml

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