## Snake Mathematics!

In Python code, you can easily perform calculations. Let's print the sum of the arithmetic operation 3+3 as an example.

```
print(3+3)
6
```

Or, let's create a variable sum, whose value is the sum of the calculation 3+3.

```
sum = 3+3
print(sum)
6
```

## Variable computation

Let's take an example of variables from the previous module:

```
player1_hp = 100
player2_hp = 100
```

We can easily create a variable whose value is the sum of both players' HP.

`total_hp = player1_hp + player2_hp`

## Adding or Subtracting the Value of a Variable

What if player 1 took 10 damage and we wanted to decrease the player's HP by ten? This can be done by giving the player1_hp variable a completely new value, but using the original value as a variable in the new value, subtracting 10 from it.

`player1_hp = player1_hp - 10`

In Python, there is a small shortcut for this (it does the same thing as above):

`player1_hp -= 10`

Boosting works the same way, let's say that the other player casts a healing spell that heals 10 damage.

`player1_hp = player1_hp + 10`

Or alternatively shortcut:

`player1_hp += 10`

## Multiplication and division operations

Multiplication operations are performed using asterisks (*) and division operations using forward slashes.

```
print(6 * 7)
42
```

```
print(12 of 4)
3
```

## Exercise

Just to do the task! You can use variables **x** and **y** with any numbers you want.

### Exercises

#### Task 1

Make the variables x, y and summa. Define the value of the variable summa as the sum of the variables x and y (i.e. the result of the addition).

#### Task 2

In addition, make the variable tulo. Define the tulo of the variable as the product of the variables x and y (i.e. the result of multiplication).

#### Task 3

In addition, variable erotus. Define the variable erotus as the difference between the variables x and y (ie the result of the subtraction).

## Ready to become an ethical hacker?

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