// html tree

let body = {
    tagName: "body",
    subTags: [
        {tagName: 'div',
            subTags:[
{tagName:'br'},
{tagName:'span', text: 'Enter a data please:'},
{tagName:'input', attrs:{type:'text', id:'name'}},
{tagName:'input', attrs:{type:'text', id:'surname'}}
]},
        
        {tagName: 'div',
            subTags:[
{tagName:'button', text:'OK', attrs:{id:'ok'}},
{tagName:'button', text:'Cancel', attrs:{id:'cancel'}}
]}
            ]
}
body.subTags[1].subTags[1].text
body.subTags[0].subTags[3].attrs.id

// declarative fields

let notebook = {
    brand: prompt('Enter  brand'),
    type:  prompt('Enter  type'),
    model: prompt('Enter  model'),
    ram: +prompt('Enter  ram'),
    size: prompt('Size'),
    weight: +prompt('Weight'),
    resolution: {
        width: +prompt ('Width'),
        height: +prompt ('Height'),
    },
};

let phone = {
    brand: prompt('Enter brand'),
    model: prompt('Enter model'),
    ram: +prompt('Enter ram'),
    color: prompt('Enter color'),
};

let person = {
    name: prompt('Enter a name'),
    surname: prompt('Enter a surname'),
    married: confirm(),
}

// object links

let person1 = {
name:prompt('Enter a name'),
smartphone:{ owner:person1},
laptop:{ owner:person1}
}

// imperative array fill 3

let array = [];
array[0] = +prompt();
array[1] = +prompt();
array[2] = +prompt();

// while confirm

let qvestion = '';
while(qvestion != true){
     qvestion = confirm('are you batman?')}


// array fill

let array1 = [];
let filling = '';
while(filling != null){
    filling = prompt('введите число'),
     array1.push(filling);
}

// array fill nopush\

let array2 = [];
let i = 0;
let filling1 = '';
while(filling1 != null){
    filling1 = prompt('введите число')
     array2[i] = filling1;
     i++
}

// infinite probability(?)
let a = Math.random()
let b = 0
while( a < 0.9){ 
b + 1;
break;
}

// empty loop

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

// progression sum

let sum = 0;
for(i = 1; i < 50; i+=3){
    sum = sum + i}
    console.log(sum);

    // chess one line

let c = '';
for(y = 0;y < 21;y++){
    if(y % 2 === 1){
c = c + '#'} 
    else {
c = c + ' '}}


// numbers

let x = ""
for (let i = 0; i < 10; i++){
    x = x + "\n" 
    for (let i = 0; i < 1; i++){
        x = x + 0
        for (let i = 0; i < 1; i++){
            x = x + 1
            for (let i = 0; i < 1; i++){
                x = x + 2
                for (let i = 0; i < 1; i++){
                    x = x + 3
                    for (let i = 0; i < 1; i++){
                        x = x + 4
                        for (let i = 0; i < 1; i++){
                            x = x + 5
                            for (let i = 0; i < 1; i++){
                                x = x + 6
                                for (let i = 0; i < 1; i++){
                                    x = x + 7
                                    for (let i = 0; i < 1; i++){
                                        x = x + 8
                                        for (let i = 0; i < 1; i++){
                                            x = x + 9
                                            
                                        }  
                                    }  
                                }  
                            }  
                        } 
                    } 
                }  
            } 
        }
    }
    
}
console.log(x)

// chess(??????????)<

// cubes(?????????)

// multiply table(???????)

// matrix to html table(????????)

// не понял с этого задания>