/**
 *Submitted for verification at scrollscan.com on 2023-10-27
*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
contract FunctionTypes{
    uint256 public number = 5;
    
    constructor() payable {}

    // 函数类型
    // function (<parameter types>) {internal|external} [pure|view|payable] [returns (<return types>)]
    // 默认function
    function add() external{
        number = number + 1;
    }

    // pure: 纯纯牛马
    function addPure(uint256 _number) external pure returns(uint256 new_number){
        new_number = _number+1;
    }
    
    // view: 看客
    function addView() external view returns(uint256 new_number) {
        new_number = number + 1;
    }

    // internal: 内部
    function minus() internal {
        number = number - 1;
    }

    // 合约内的函数可以调用内部函数
    function minusCall() external {
        minus();
    }

    // payable: 递钱，能给合约支付eth的函数
    function minusPayable() external payable returns(uint256 balance) {
        minus();    
        balance = address(this).balance;
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"payable","type":"constructor"},{"inputs":[],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_number","type":"uint256"}],"name":"addPure","outputs":[{"internalType":"uint256","name":"new_number","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"addView","outputs":[{"internalType":"uint256","name":"new_number","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minusCall","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"minusPayable","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"number","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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ipfs://90d702568fc163233814a35a1e64dae0cb6c121259de970425b8740968bf9b11