continue: exit this loop, generally used when excluding or skipping an option

break: Exit the entire for loop. It is generally used when the result has been obtained and subsequent loops are not needed.

while(true) to create an "infinite" loop, you need to use break to exit the loop

for(;;) is used to construct an "infinite" loop, and break is also needed to exit the loop.

let array name = [data1, data2,..., datan]

let arr = new Array (data 1, data 2, ..., data n)

Arrays are stored in order, and each data has its own number

Numbering starts from 0

In an array, the number of the array is also called a subscript or index.

Arrays can store any type of data

Length: The number of data in the array, obtained through the length attribute of the array

Subscript: the number of the data in the array

Element: Each data stored in the array is called an array element.

Use a loop to access each element in the array, usually using a for loop

Syntax: for (let i = 0;i<array name.length;i){document.write(array name[i])}

array[subscript]

array[subscript] = new value

arr.push (new content)

arr.unshift (new content)

arr.pop()

arr.shift()

arr.splice (subscript of operation, number of deletions)

Syntax: let arr = [4,2,1,5,3] arr.sort(function(a,b){ returna-b })