Python String upper()

message = 'python is fun'

# convert message to uppercase
print(message.upper())

# Output: PYTHON IS FUN

Syntax of String upper()

The syntax of upper() method is:

string.upper()

upper() Parameters

upper() method doesn't take any parameters.

upper() Return Value

upper() method returns the uppercase string from the given string. It converts all lowercase characters to uppercase.

If no lowercase characters exist, it returns the original string.

Example 1: Convert a string to uppercase

# example string
string = "this should be uppercase!"
print(string.upper())

# string with numbers
# all alphabets should be lowercase
string = "Th!s Sh0uLd B3 uPp3rCas3!"
print(string.upper())

Output

THIS SHOULD BE UPPERCASE!
TH!S SH0ULD B3 UPP3RCAS3!

Example 2: How upper() is used in a program?

# first string
firstString = "python is awesome!"

# second string
secondString = "PyThOn Is AwEsOmE!"

if(firstString.upper() == secondString.upper()):
    print("The strings are same.")
else:
    print("The strings are not same.")

Output

The strings are same.

Note: If you want to convert to lowercase string, use lower(). You can also use swapcase() to swap between lowercase to uppercase.