Sometimes it is useful to check several conditions. For example, if a user inputs a new password and the length of the password should be checked:

if len(password) < 8:
  print("Password too short")
else:
  if len(password) >= 64:
    print("Password too long")

The second if statement checks if the password exceeds the maximum length of 64. This causes a double indentation in the code. A more clean solution is to use elif:

if len(password) < 8:
  print("Password too short")
elif len(password) >= 64:
  print("Password too long")
else:
  print("New password confirmed")