Solidity Arrays Explained: Fixed, Dynamic, and Memory vs Storage

Arrays are the backbone of smart contracts, but using them wrong can cost you massive amounts of gas. Here is everything you need to know about Arrays in Solidity! If you want to store multiple users, transactions, or NFTs in your smart contract, you need to master arrays. In this beginner-friendly Solidity tutorial, we break down exactly how arrays work under the hood. We cover the critical differences between Fixed-Size and Dynamic Arrays, how to properly use .push(), .pop(), and .length, and the ultimate gas-saving rule: Memory vs. Storage. Whether you are building leaderboards, storing token IDs, or just learning Web3 development, this video will keep your contracts secure and optimized.