how can i find what this line of code is doing

[sadath-12]

    IERC721 nft = IERC721(nftAddress);

is it contructor or what? im not able to find this

[technophile-04]

Hii @sadath-12 !, This is not constructor here we are just type-casting nftAddress to type IERC721

[sadath-12]

ok got i thought we are doing some stuffs related to approval

[technophile-04]

Yup it helps solidity understand what type of contract this address belong to and accordingly we can call functions related to that deployed contract address