//while confirm

{
let question 
while(!question){
    question = confirm("Putin huylo?")
    if(question){
        break
    }   
}
}

//array fill
{
    let arr = []
    let question  
    while(question = prompt()){
        arr.push(question)
    }
        
    console.log(arr)
}


//array fill nopush
{
    let arr = []
    let question  
    let i = 0
    while(question = prompt()){
        arr[i] = question
        i++
    }
        
    console.log(arr)
}


//infinite probability

{
    let arr = [] 
    while(Math.random()  < 0.9){
        arr.push("a")
        if(Math.random()  > 0.9){
            alert(`${arr.length}`) 
            break
        }
        
    }
}



//empty loop
//Сделайте цикл с prompt, который прерывается по нажатию OK и продолжается по нажатию "Отмена" c пустым телом цикла.
{
let question 
while(prompt("Write something") == null){
    question = prompt("Write something")
    if(question == String){
        break
    }
}
}


//progression sum 

{
   let result = 0
   for(i=1;i<20;i+=3){ 
    result += i 
   }
   console.log(result)
}

  

     

   


//chess one line

{
let str =""
 function symbol(lineLenght) {
    for(i=0;i<lineLenght;i++){
        str += "# "      
    }
    return str 
}
console.log(symbol(5))
}


//numbers
//Сформировать строку c помощью вложенных циклов. Для перевода строки используйте \n.
{
    let str =""
    for(i=0;i<10;i++){
        str += "" 

        
        for(j=0;j<10;j++){
            str += `${j}`
        }
        str += "\n"
    }
    console.log(str)
}



//chess

{
    let str = ""
    const change =(width,hight) =>{

    for(i=0;i<hight;i++){
        str += "\n"
        if(i%2===0){
            for(j=0;j<width;j++){
                str += `#.`
            } 
        }
        if(!(i%2===0)){
            for(j=0;j<width;j++){
                str += `.#`
            }
        }

    }
    return str
 }
    console.log(change(3,10))
}


//cubes
//Сформируйте массив из N элементов, содержащий в себе кубы индексов, т. е:
{
    let arr = []
    function arrForCubes (n){
        for(i=0;i<n;i++){
           
            arr[i] = Math.pow((i-1),3)          
        }
        return arr
    }
    console.log(arrForCubes(5))
}


//multiply table
{
let arr = []
for(i=0;i<10;i++){
    arr[i] = []
    
   for(j=0;j<10;j++){
    arr[i][j] = i * j
   }
}
console.log(arr)
console.log(arr[5][6])

}


//ромбик

//????????????????????????????????



//read array of objects
{
    
    let readArrayOfObjects = () =>{
        let arr=[]
        let obj = {}
        let i=0
        let key,value
        
        while(confirm(`do you want create an object${i}`)){
            while(key = prompt(`Write your key or click "Отмена"`)){
                value = prompt("write value for key")
                obj[key] = value
                
            }
            arr.push(obj)
            obj={}
            i++
           
        }
        return arr
    }
    readArrayOfObjects()
}


//DOM: multiply table
{
    
    let table = document.createElement('table')
    table.border = "1"

    for(i=1;i<10;i++){
        let tr = document.createElement('tr')
        table.append(tr)
        if(i%2===0){
            tr.style.background = 'silver'
        }
    
        for(j=1;j<10;j++){
        let td = document.createElement('td')
        tr.append(td)  
        td.innerText = i * j
        }
    }
    document.body.append(table)

}



//DOM: highlight cell
{
    
    let table = document.createElement('table')
    table.border = "1"

    for(i=1;i<10;i++){
        let tr = document.createElement('tr')
        table.append(tr)
        
        if(i%2===0){
            tr.style.background = 'silver'
        }
    
        for(j=1;j<10;j++){
        let td = document.createElement('td')
        tr.append(td)  
        td.innerText = i * j
        td.onmouseover = () =>{
            td.style.backgroundColor = "red"
        }
        td.onmouseout = () => {
            td.style.backgroundColor= ""
        }
        }
       
    }
    document.body.append(table)

}


//DOM: Highlight cross

{
let table = document.createElement("table")
table.border = "2"

for (let i = 1; i <= 9; i++) {
    let tr = document.createElement("tr")
    table.append(tr);
    for (let j = 1; j < 10; j++) {
        let td = document.createElement("td")
        td.innerText = i * j
        tr.append(td)

        td.onmouseover = () => {          
            for (let k = 0; k < 9; k++) {
                table.rows[i - 1].cells[k].style.backgroundColor = "lightblue"
            }
            for (let k = 0; k < 9; k++) {
                table.rows[k].cells[j - 1].style.backgroundColor = "lightblue"
            }
            td.style.backgroundColor = "yellow"
            
        }
        td.onmouseout = () => {          
            for (let k = 0; k < 9; k++) {
                table.rows[i - 1].cells[k].style.backgroundColor = ""
            }
            for (let k = 0; k < 9; k++) {
                table.rows[k].cells[j - 1].style.backgroundColor = ""
            }
            
        }
    }
}
document.body.append(table)
}