how to change a lower case to upper case using function

I’m trying to convert a input parameter to capital case.

text = input("write anything you wish you change to capital case: ")

def case_change():
text.upper()

print(case_change(text))

>Solution :

The answer to your question is:

#your text
text = input("write anything you wish you change to capital case: ")

#function
def case_change(text):
   return text.upper()

your_uppercase = case_change(text)

#print
print(("uppercase: "+upper_case)