change uppercase to lowercase in python code example

Example 1: python convert string to lowercase

# By Alan W. Smith and Petar Ivanov
s = "Kilometer"
print(s.lower())

Example 2: python3 lowercase

str.lower()

Example 3: python 3 calculate uppercase lowercase letter

world = input()
upper,lower = 0,0

for i in world:
    upper+=i.isupper()
    lower+=i.islower()

print("UPPER CASE {0}\nLOWER CASE {1}".format(upper,lower))

Example 4: python string lowercase

startString = "TeST StrIng"
lowerCaseString = startString.lower()
print(lowerCaseString)
# Output -> "test string"