I subscribe to several newsletters and blogs where experts discuss the latest developments in the industry. I also attend as many conferences and seminars on blockchain technology as I can. Last year I took a course on the Solidity Programming language, which helped me understand Ethereum better."
The first thing you need to do when creating your Solidity file is define a class. To avoid compilation errors caused by incompatibility of different Solidity versions, you must declare their version numbers first.