how to convert string in lowercase in python code example

Example 1: how to change a string to small letter in python

my_str = "Hello World"
my_str.lower()
print(my_str)

Example 2: python to uppercase

original = Hello, World!

#both of these work
upper = original.upper()
upper = upper(original)

Example 3: python lowercase

// turn to lower/upper
string = string.upper()
string = string.lower()

// check if all letter are lower or upper
string.islower()
string.isupper()