Often times when we make a decision with a boolean, we are choosing between two possibilities. It can look awkward when we just use the if statement, like this:

is_night = True

if is_night:
  print("drink tea")
if not is_night:
  print("drink coffee")

This is so common, there is a special instruction for this pattern, called else.

is_night = True

if is_night:
  print("drink tea")
else:
  print("drink coffee")

This program has the same output as the first program, but the instructions are run in a different way.

The pattern is

if boolean:
  code
else:
  code

In this example

If we pretend to be a computer, at line 3 we evaluate the boolean value as 'False'. In this case, instead of going to the next line of code with the same indentation as the if statement, we navigate to the code block after the else instruction at line 5.