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contracts...Functions.sol

pragma solidity >=0.8.10;

contract FunctionsContract {

    string ownerName;
    uint8  ownerAge;

    // Constructor
    constructor (string memory name, uint8 age) public {
        ownerName = name;
        ownerAge = age;
    }

    // We are changing the owner name and age
    function setOwnerInfo(string memory name, uint8 age) public {
        ownerName = name;
        ownerAge = age;
    }

    function secretFunction() private pure {
        // Not available outside this contract
    }

    // Get owner name and age
    function  getOwnerInfo() public view returns (string memory name, uint8 age){
        name = ownerName;
        age = ownerAge;
    }

    // Get the name
    // 2 ways to return values from a function
    function getOwnerName() public view returns (string memory) {
        return ownerName;
    }

    // Get the age
    function getOwnerAge() public view returns (uint8 age){
        age = ownerAge;
    }
}

notes.md

Function types -

https://docs.soliditylang.org/en/v0.5.3/structure-of-a-contract.html?highlight=function#functions https://docs.soliditylang.org/en/v0.5.3/contracts.html?highlight=fallback#fallback-function https://docs.soliditylang.org/en/v0.5.3/contracts.html#function-modifiers

access modifiers

• public
• private
• view/constant - returns data but does not modify data
• pure - function will not modify or read data
• payable - can send ether to

visibility

• public - visible outside the contract
• private - visible with contracnt
• internal - can only be accessed within contract (almost like static)
• external - cannot be called internally (does not apply to storage)