Convert string to all uppercase¶
Write a python function to convert a given string to all uppercase
if it contains at least 2 uppercase characters in the first 4 characters.
def to_uppercase(S):
num_upper = 0
for letter in S[:4]:
if letter.upper() == letter:
num_upper += 1
if num_upper >= 2:
return S.upper()
return S
# test
print(to_uppercase('Python')) # Python
print(to_uppercase('PyThon')) # PYTHON