Python string lower() usage and example

Python string methods

The lower() method of the string converts all uppercase letters in the string to lowercase and returns them.

The syntax of the lower() method is:

string.lower()

String lower() parameter

The lower() method does not take any parameters.

Return value from string lower()

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

If there are no uppercase letters, return the original string.

Example1Convert the string to lowercase

# Example string
string = "THIS　SHOULD　BE　LOWERCASE!"
print(string.lower())
# String and number
# All letters are lowercase
string = "Th!s　Sh0uLd　B3　L0w3rCas3!"
print(string.lower())

When running the program, the output is:

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

Example2How to use lower() in the program?

# First string
firstString = "PYTHON　IS　AWESOME!"
# Second string
secondString = "PyThOn　Is　AwEsOmE!"
if(firstString.lower() == secondString.lower()):
　　　　print("The strings are the same.")
else:
　　　　print("The strings are different.")

When running the program, the output is:

The strings are the same.

Note:If you want to convert it to an uppercase string, please useupper()You can also useswapcase()Swap lowercase and uppercase letters.

Python string methods