Homework.2.p.2/file.js

// switch: sizes

let size = prompt("Enter your ukrainian size");
switch (size){
    case "40": document.write("<div>American size - 6</div>");
                break;
        case "42": document.write("<div>American size - 8</div>");
                break;
        case "44": document.write("<div>American size - 10</div>");
                break;
        case "46": document.write("<div>American size - 12</div>");
                break;
        case "48": document.write("<div>American size - 14</div>");
                break;
        case "": document.write("<div>Size not specified</div>");
                break;
        default: document.write("<div>Not a size</div>");
    }

    // switch: if

    let color = prompt("Введите цвет");
         if (color === "red") 
{document.write("<div style='background-color: red;'>red</div>")}
 else if (color === "black")
{document.write("<div style='background-color: black; color: white;'>black</div>")}
    else if (color === "blue") 
{document.write("<div style='background-color: blue; color: white;'>blue</div>")}
    else if (color === "green") 
{document.write("<div style='background-color: green; color: green ;'>green</div>")} else {document.write("<div style='background-color: gray;'>Not a color</div>")}
 

    // prompt: or(?)

    let age = prompt('сколько вам лет?');
if (age === '' || age === null){
            alert('Error')}
            else {
                bornYear = 2022 - age;
                alert(`Вы ${bornYear} года`)
            }

            
        //     confirm: or this days

        let qvest0 = confirm('Shoping?');
        alert( false || "ты бяка");

        // confirm: if this days

        let qvest = confirm('Shoping?');
      if (qvest === false){
          alert('Ты бяка')}

        //   triple prompt

        let name = prompt('Enter your name');
        let surname = prompt('Enter your surname');
        let middleName = prompt('Enter your middle name')
          alert(name + ' ' + surname + ' ' + middleName);

        //   default: or 

        let defName = "Marko";
        let defSurname = "Volchenko";
        let defMiddleName = "Alexandrovich";
        
        let name1 = prompt("Enter your name") || defName;
        let surname1 = prompt("Enter your surname") || defSurname ;
        let middleName1 = prompt("Enter your middle name ") || defMiddleName;
        
        alert(name1 + " " + surname1 + " " + middleName1);
        

        // default: if 

let defName1 = 'Marko';
 let defSurname1 = 'Volchenko';
  let defMiddleName1 = 'Alexandrovich';
   let name2 = prompt("Enter your name")
    if (name2 === null || " ") {
     name2 =  defName1}
      let surname2 = prompt("Enter your surname")
    if (surname2 === null || " ") {
     surname2 =  defSurname1}
       let middleName2 = prompt("Enter your middlename")
    if (middleName2 === null || " ") {
     middleName2 =  defMiddleName1}
        alert( name2 + ' ' + surname2 + ' ' + middleName2);
        
        // login and password


//         let log =  prompt('Enter login');
// if (log == 'admin'){let passw = prompt('Enter your password')}

// if (passw == 'qwerty'){alert('Great!')};
  

// нужно доделать