# Basic Operators

This section explains how to use basic operators in Python.

### Arithmetic Operators

Just as any other programming languages, the addition, subtraction, multiplication, and division operators can be used with numbers.

``````number = 1 + 2 * 3 / 4.0
``````

Try to predict what the answer will be. Does python follow order of operations?

Another operator available is the modulo (%) operator, which returns the integer remainder of the division. dividend % divisor = remainder.

``````remainder = 11 % 3
``````

Using two multiplication symbols makes a power relationship.

``````squared = 7 ** 2
cubed = 2 ** 3
``````

### Using Operators with Strings

Python supports concatenating strings using the addition operator:

``````helloworld = "hello" + " " + "world"
``````

Python also supports multiplying strings to form a string with a repeating sequence:

``````lotsofhellos = "hello" * 10
``````

### Using Operators with Lists

Lists can be joined with the addition operators:

``````even_numbers = [2,4,6,8]
odd_numbers = [1,3,5,7]
all_numbers = odd_numbers + even_numbers
``````

Just as in strings, Python supports forming new lists with a repeating sequence using the multiplication operator:

``````print [1,2,3] * 3
``````

## Exercise

The target of this exercise is to create two lists called `x_list` and `y_list`, which contain 10 instances of the variables `x` and `y`, respectively. You are also required to create a list called `big_list`, which contains the variables `x` and `y`, 10 times each, by concatenating the two lists you have created.