Java Script arrays

Java Script arrays are used to store multiple values  in a single variables . It may single value or collection of objects . Arrays are very important in Java Script. Let us look how can we create arrays in Java Script.
we can create Java script arrays as follows .

var subjects=["Telugu","Tamil","Hindi","English "] ;

we can also create Java script arrays  as follows

var subjects=[]; this indicates an empty array with the name of subjects;

let us add some values for the arrays . Arrays value positions are started from 0 . It means in the above example the index (position )  of the Telugu is "0", and Tamil is "1",

so we can add the values for the array in as follows.

subjects[0]="Telugu";
subjects[1]="Tamil";

How can we retrieve or Iterate the Data from an array ?

we can do it in two different methods .  The first way of doing this is by using the for loop . First wee need to find out the no of values inside the array  . By using the "length" method we can do it

Example: subjects.length will give you the no of values inside the array .

Once we found the no of values in the array, with help of for loop we can iterate the array as follows;

for (var i=0; i<subjects.length;i++){
console.log(subjects[i]);
}

How the for loop works?