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Solidity is a contract-oriented, high-level language whose syntax is similar to that of JavaScript and it is designed for writing smart contracts in Ethereum to run on the EVM. Solidity is statically typed, supports inheritance, libraries and complex user-defined types among other features.
1
vote
Assigning a New Owner
Because you put comparator operator == there, you should have used =.
More Explanation
Since you used == function checks if owner and _address equals and does not do any change so your editor suggests …
1
vote
Accepted
Is it not necessary to use deployed contract for using interface?
First more information on msg.sender
You can't pass msg.sender is always the address calls the function. If another contract calls this function then msg.sender is that contract, if a EOA (Externally …