A public state variable is a type of variable found in smart contracts, which are self-executing contracts with the terms directly written into code. These variables store data that can be accessed and read by anyone on the blockchain.Public state variables are automatically created with getter functions, allowing users to retrieve their values without needing additional code. This transparency ensures that all users can verify the information directly, fostering trust in the system.For example, if a smart contract manages a token’s balance, the token balance can be a public state variable. Anyone can check the balance of any address, promoting openness and accountability in financial transactions.However, the data stored in public state variables is immutable, meaning it cannot be changed or erased once recorded. This permanence helps maintain a secure and reliable history of interactions within the contract. Public state variables play a crucial role in decentralized applications, providing vital information to users while ensuring that all activities can be independently verified.