//html tree

let body = {
    tagName: "body",
    subTags: [
        {
            tagName: "div",
            subTags: [
                { tagName: 'span', text: 'Enter a data please:' },
                { tagName: 'br' },
                { tagName: 'input', attr: { type: 'text', id: 'name'  } },
                { tagName: 'input', attr: { type: 'text', id: 'surname' } },
        
            ]
        },
        {
            tagName: 'div',
            subTags: [
                { tagName: 'button', text: 'ok', attr: { id:'ok' }  },
                { tagName: 'button', text: 'Cancel', attr: { id: 'cancel' } }
            ]
        }

        
    ]
 
}

body.subTags[1].subTags[1].text
body.subTags[0].subTags[3].attr.id


//declarative fields


var notebook = {
    brand: prompt('Enter brand'),
    type:  prompt('Enter type'),
    model: prompt('Enter model'),
    ram: prompt('Enter ram'),
    size: prompt('Enter size'),
    weight: prompt('Enter weight'),
    resolution: {
        width: prompt('Enter width'),
        height: prompt('Enter height'),
    },
};

var phone = {
    brand: prompt('What is brand?'),
    model: prompt('What is model?'),
    ram: +prompt('Enter you ram?'),
    color: prompt('What is color?'),
    
};

//object links

var person = {
    name: prompt('What is you name?'),
    surname: prompt("What is you surname?"),
    married: confirm('Are you married?'),
   
}
person.phone = phone
person.notebook = notebook
phone.owner = person
notebook.owner = person

//imperative array fill 3

let th = []
th[1] = prompt();
th[2] = prompt();
th[0] = prompt()

//while confirm

let qw = "";
while (qw !== true) {
    qw = confirm('?')
}

//array fill
let mass = [];
let qu = ""
while ( (qu = prompt('Чего д0бавить?')) !== null) {
    
    mass.push(qu)
}



//array fill nopush
let mass1 = [], i=0 ;
let qu1 = ""
while ( (qu1 = prompt('Чего д0бавить?')) != null) {
    
    mass1[i++] = qu1
    
}

//infinite probability

let numb = 0
while ( Math.random() < 0.9) {
    numb += 1
   
}
alert(numb)

//empty loop

let a = ''
while (a != prompt());


//progression sum
let aa = 0
for (i = 1; i < 100; i += 3){
    aa = aa + i
}

//chess one line
let q = ""
for (i = 0; i < 15; i++){
    if (i % 2 === 1) {
        q = q + " "
    } else {
        q = q + "#"
    }
    
}  

//numbers

/*let w = ""
for (let i = 0; i < 10; i++){
    w = w + "0123456789\n"
  
}
console.log(w) */

str = ""
for (let i = 0; i < 10; i++){
    str = str + '\n'
    for (let j = 0; j < 10; j++){
        str = str + j
    }
}
console.log(str)


//chess 

let chess = ""
for (let i = 0; i < 6; i++) {
    
    chess += '\n'
       
    for (let j = 0; j < 6; j++) {
        if (i % 2 === 1) {
            chess += ".#"
        } else {
            chess += "#."
        }
        
        
    }
}
alert(chess)

// cubes

let mass11 = []  
for (let i = 0; i < 15; i++){

    mass11.push(i ** 3)
    
}
console.log(mass11[i])

//multiply table


let mas = []

for (let i = 0; i < 10; i++){
        mas[i] = []
    for (let j = 0; j < 10; j++){
        mas[i][j] = [j*i] ;     //<============  или   ============>      mas[i].push(i*j)
    }
}

//matrix to html table    тут страшные и непонятные вещи происходили , короче , как-то склепал

document.write( "<table border='1'>")
let mas = []
for (let i = 1; i < 10; i++){
    mas[i] = []
    document.write("<tr>")
    for (let j = 1; j < 10; j++){
    
    document.write(  `<td>${mas[i][j] = [j * i]}</td> `)
        
    }
    document.write("</tr>")
}
 document.write("</table>")



//Задание на синий пояс: Треугольник   


 let n = 6;
 for (let i = 1; i <= n; i++) {
     let str = '';
     for (j = 1; j <= 2 * n - 1; j++) {
         if (j >= n - (i - 1) && j <= n + (i - 1)) {
             str += '#';
         } else {
             str += '.';
         }
     }
     console.log(str);
 }