# Elixir Atoms and Integers explained through q&a

This post works best when paired with the Elixir docs for a general overview of Atoms and Integers.

### What is an Elixir Atom?

It is an Elixir data type thats value is its own name.### What is an Elixir Atom used for?

They are often used to indicate the result of an operation either as the first value of a tuple or as a standalone response. `:ok` is often used to indicate a successful operation and `:error` is used if something goes wrong. ``` {:ok, result} = some_function():ok = some_other_function()

```
<h3>What is special about the values true, false and nil as they relate to atoms?</h3>
Each of those data types are atoms. Elixir allows you to skip typing the colon (:) for these atoms. Ex:
```

true == :true => true

nil == :nil => true

false == :false => true

```
<h3>Which data type represents whole numbers in Elixir Integer or Float?</h3>
`Integer`. `Float` is used for fractional numbers.
<h3>The Kernel and Integer module each define integer functions. What integer functions does the Kernel define?</h3>
`abs/1`, `div/2`, `min/2`, `max/2`, `rem/2`. These are all arithmetic based functions.
<h3>What functions does the Integer module define?</h3>
`is_env` and `is_odd`. These are most often used as Guards in Elixir.
```

Integer.is_even(12) => true

Integer.is_odd(12) => false

```
More Elixir Decks:
1. [Tuples](https://www.devdecks.io/2021-elixir-tuples-explained)
2. [List](https://www.devdecks.io/2021-elixir-lists-explained)
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