Davidegloh

//Loops 


//While loop

pragma solidity 0.7.5;

contract HelloWorld {

Davidegloh

//Control Flow  (if, else)
pragma solidity 0.7.5;

contract HelloWorld {
    // state variables
    string message ; // message will have the value of _message
    
    constructor(string memory _message){
        message = _message;
    }

Davidegloh

//Pure fonction = that doesn't interact with other state variable 
//View fonction = that interacts (retrieve) with something else such as state variable but isn't allowed to change the state variable. 

Davidegloh

// JS is an untyped language
var a = 1;
var b = "Hello";
var c = false;
var d = 2.5;


// Solidity uses a typed language
int a = -1; // int means "signed integer It can be positive and negative nb
uint aa = 2; //uint means "unsigned "integer" can only nb >= 0 

Davidegloh

pragma solidity 0.7.5;

contract HelloWorld {

    function hello() public pure returns(string memory){
        return "Hello World"; 
    }

Davidegloh

import React from 'react';
// import PropTypes from 'prop-types';
import 'semantic-ui-css/semantic.min.css'
import { Icon, Input } from 'semantic-ui-react';

import './styles.scss';

const Recettes = () => (
  <section className="recettes">
    <h1 className="page-title">Recettes</h1>

Davidegloh

import { useState } from "react";
import Item from "./Components/Item/Item";

function App() {
  const [dataArr, setdataArr] = useState([
  {nom: "David" },
  {nom: "Burger" },
  {nom: "King" },
]);

Davidegloh

import { useState } from "react";
import Item from "./Components/Item/Item";

function App() {
  const [toggle, setToggle] = useState(true);

  const changeState = () => {
    setToggle(!toggle);
  };

Davidegloh

// Si je veux télécharger la photo et l'avoir dans mes données, je la met dans le dossier du composant en question. Dans cette exmeple
//s'agit de "Item". 

import { useState } from 'react';
import './item.css';
//J'importe la photo à cet endroit 
import Ethereum from './Ethereum.jpg';

function Item(){

Davidegloh

//Le State sont les données de mon composant.