.upper()

Takes a string, and returns a copy of that string in which all letters are uppercase. Numbers and symbols are not changed.

string.upper()

my_string = "shout"

print(my_string)
print(my_string.upper())

This would output:

shout
SHOUT

Notice how the .upper() method does not change the string it is used on.

The .upper() method can be used to compare strings:

string1 = "Green Tigers"
string2 = "gReEn tIgErs"

if string1 == string2:
  print("These strings are already the same")
elif string1.upper() == string2.upper():
  print("They are the same when you use the .upper() method")
else:
  print("They are NOT the same")

# Output: They are the already the same when you use the .upper() method

my_string = "amazing!"

if my_string.upper() == "AMAZING!":
  print("Isn't that just " + my_string)
# Output: "Isn't that just amazing!"