More about Pragmas in Solidity.
Pragma in solidity is used to specify what version of solidity your smart contract uses and thereby help the compiler to decide on the required.
Why should the solidity version be specified?
Solidity is a pretty new language and updates oils are still taking place which makes the language change its version concurrently.
Asides this, you will get an error warning if you fail to specify the solidity version in your code.
Where is the pragma solidity located?
It’s usually located at the top of your source code right after the license identifier. However, you could place it at any point in your code but as best practice, the top of the code does it.
How do you know what version of solidity to use?
It’s always best to use the latest version of solidity except you have some limiting factors.
As at the time writing this, the latest version is 0.8.15
What does the various solidity syntax mean?
pragma solidity ^0.6.0 : This pragma means that the file will not compile with an earlier version and won’t work on the next version (0.7.0) but would work with 0.6.x branch (0.6.1, 0.6.4, 0.6.4 and so on)
pragma solidity >=0.8.0 <0.9.0: This means that the source code is to be compiled with a version of solidity that is greater than or equal to 0.8.0 but less than 0.9.0.
pragma solidity 0.8.4 : This is the recommended method of specifying solidity version, without a caret. What this means is that this exact version would be used.
Thank you for reading till the end. Now you know more about pragmas and how to use them. You are a smart contract OG!
