# Here we define the function with a parameter
def greet(lang):
if lang == 'spanish':
print('Hola!')
elif lang == 'french':
print('Bonjour!')
else:
print('Hello!')
# Now we can call or invoke the function with different parameters
greet('spanish') # Output - Hola!
greet('french') # Output - Bonjour!
greet('english') # Output - Hello!