Let's look at some examples first.

The first example: checking a number for negativity.


```
Input:
number = 15
if number >= 0:
    print('this number is positive:', number)
if number < 0:
    print('this number is negative', number)
Output:
this number is positive: 15
```

The second example: checking whether a chocolate bar is expensive or has an average price.


```
Input:
price_of_chocolate = 33
if price_of_chocolate <= 35:
    print('this a chocolate bar has an average price')
if price_of_chocolate > 35:
    print('this a chocolate bar is expensive')
Output:
this a chocolate bar has an average price
```

We can see that in order to handle several different situations, you need to write **if-statements** several times.

But in order not to do this, we can use the **if-statement** with the keyword **else**.

Let's rewrite the example above, simplifying them by using the keyword **else**.


```
Input:
number = 15
if number >= 0:
    print('this number is positive:', number)
else:
    print('this number is negative', number)
Output:
this number is positive: 15
```


```
Input:
price_of_chocolate = 33
if price_of_chocolate <= 35:
    print('this a chocolate bar has an average price')
else:
    print('this a chocolate bar is expensive')
Output:
this a chocolate bar has an average price
```

We can see that the code has become somewhat simpler, but at the same time it works just as correctly as it worked, and in fact nothing specific has changed.

Here we get acquainted with the simplest representations of the conditional operator if. In addition, we get acquainted with the use of logical operators and the priorities for their use, after which we consolidate the knowledge of practice.

In this section, we are introduced to a more advanced form of the conditional operator - if-else. We will also learn what nested if-else statements are and practice on tasks.

At the end of the course, we will learn about the most advanced form of the conditional operator if-elif-else, get acquainted with the syntax of this construction and how it is applied correctly.