Arithmetic operators are used frequently in order to **calculate and process data** in your program. You will use them a lot for different purposes and are important to understand.

Let's briefly look at what all operators does and what they look like

`+`

adds numbers:

`-`

subtracts numbers from each other:

`*`

multiplies values:

`/`

divides numbers:

`%`

is called the "modulus operator" and it also performs division. However, it only returns the **remainder** of what's left:

When it comes to arithmetic, it works exactly like it does in maths. We follow the basic rules of mathematics for calculating.

**Tip:** When calculating, it is often a good habit to use paranthesis, even if the program works without them, to avoid making some basic math mistakes. Sometimes you'll want to type `(10 + 3 + 5 + 7)`

instead of just `10 + 3 + 5 + 7`

even if it seems obvious to you that they're the same!

## Exercise

Create a program that calculates the avarage value of a bunch of numbers. If your values are $1$, $2$ and $3$, the result should be $2$.

Remember the arithmetic order for how the calculation works. Paranthesis, multiply/division and addition/subtraction.

Declare a few variables and set them to a value of your choice

Store the calculation in another variable

Print out the result!

## Comments

You need a Ludu account in order to ask the instructor a question or post a comment.

Be the first to comment!