if we can use elif why use nested loop code example

Example 1: if else python

# IF ELSE ELIF 

print('What is age?')
age = int(input('number:')) # user gives number as input
if age > 18:
    print('go ahead drive')
elif age == 18:
    print('come personaly for test')
else:
    print('still underage')

Example 2: python if

def e(x):
	if x == "Sunny" and x == "sunny":
  		print('Remember your sunglasses!')
	elif x == "Rainy" and x == "rainy":
  		print('Do not forget your umbrella!')
	elif x == 'Thunderstorm' or x == 'thunderstorm' or x =='Stormy' or x == 'stormy':
      print('Stay Home!')
    
x = input('What is the weather?')