Potentially should be constant/view/pure but is not error in the code

[ShivSankar]

I'm getting the warning which is highlighted in yellowish color when I' m using this code. I understand that the issue in addPeople function but can anyone tell me how to get rid of it?

[cromewar]

I checked this and there is nothing wrong with your code, this is just a recommendation provided by the solidity extension on REMIX but you can safely ignore this warning, you cannot use those types because:

• Pure is for mathematical operations.
• constant for functions which will not alter the state of a contract.
• view will not make state changes and this function does.

I hope this info might help, cheers.