Python String lower()

message = 'PYTHON IS FUN'

# convert message to lowercase
print(message.lower())

# Output: python is fun

Syntax of String lower()

The syntax of lower() method is:

string.lower()

lower() Parameters()

lower() method doesn't take any parameters.

lower() Return value

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

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

Example 1: Convert a string to lowercase

# example string
string = "THIS SHOULD BE LOWERCASE!"
print(string.lower())

# string with numbers
# all alphabets should be lowercase
string = "Th!s Sh0uLd B3 L0w3rCas3!"
print(string.lower())

Output

this should be lowercase!
th!s sh0uld b3 l0w3rcas3!

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

# first string
firstString = "PYTHON IS AWESOME!"

# second string
secondString = "PyThOn Is AwEsOmE!"

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

Output

The strings are same.

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