# Indices law - Law 4

## `a^0=1`

How to remember `a^0=1`

Anything to the power zero is `1`

It doesn't matter how many people there are there is only **one** sun.

One sun is one.

## But why?

Try simple numbers you know first

We know `10/10=1`

But so too `10^2/10^2=1`

But this can be rewritten as `10^2\times 10^-2`

And rewritten again as `10^(2-2)=10^0`

So `10^0` must be `1`