Representing a Number in Base 10

Let's first take a look at the familiar decimal system or base 10!

The decimal system owes its popularity to the fact that we have ten fingers!

For instance, 1789 can be represented by:


1 x 1000  + 7 x 100  +  8 x 10 + 9 x 1

In fact, any number between 0 and 99999, can be represented by the formula:

edcba = e x 10⁴ + d x 10³ + c x 10² + b x 10¹ + a x 10⁰
where a, b, c, d, e have a value between 0 and 9.

For numbers bigger than 99999, you just need to add f x 10⁵ to the above equation and so on.