We never called the function we created so how was it ran? I'm somewhat lost.

Hi, Derrick

A do while loop works different than a simple while loop. Let's see both of these in action :

Firstly a simple while loop:

var count = 0;

while(count != 0){
  console.log("Hello Derrick");
}

What do you think will be printed on console? we will never go inside the loop because our while condition (count != 0) will return false.

But with Do-while loop we can still go inside the loop once and then check the condition, so no matter what the condition is we will be able to run the body of loop at least once.

var count = 0;

do{
console.log("Hello Derrick");
}while(count != 0);

It will print on console "Hello Derrick" once and then will check the while condition which will turn false so it will only run body of loop for once.

About the video and function,

Look at the first line of code

var randomNumber = getRandomNumber(10);

Dave called the function in the first line of code.

I hope it answers your question , Happy learning :)

• Zain