Our information is useful because we do not need to do everything.
Plus we have for loops and the cook it looks cleaner.
Let's say we have an array of phone numbers and we want to add every numbers in the array by free.
For example
we just need to simply write like this.
That number will add by fully
piano that we saw.
And as you can see each number is added by free
also we can express these two a function.
So there is not much meaningful.
For example we can add create a pass for function which is equal to number
and each number is added by 4.
And then we create a plus for.
We just need to copy this 1
and then we pass the parts for functions inside the map function.
And then we pin all the numbers.
And as you can see at this time each of the values in a way is at a by 4.
So this is how this map function work in a rate.