Question

JavaScript help: Can someone give me a brief explanation/review of loops and arrays with some examples. Also please explain indexing

Answer 1

In javascript, there are several ways to execute loops:

• for loop
• while loop
• do-while loop
• for-in loop
• for-of loop

Let's execute for loop a better understanding:

The structure of for loop looks like this:

for(statement A ; statement B ; statement C)

{

Code Block

}

For example:

var sum=0;

for( c=1;c<5;c++)

{

sum+=c;

}

Now let's have a look at arrays in Javascript:

Arrays are used to store more than one data elements in Javascript at a time. It stores multiple values in a single variable and they can be accessed by using indices. We can easily change values in these arrays using indices.

There are various functions we can use with arrays like: toString(), pop(), push(),etc.

For example:

var colors = [ "White", "Black", "Green"];