Python String lower() method is “used to convert all uppercase characters in a string into lowercase characters and returns it.”
Syntax
string.lower()Parameters
The lower() method doesn’t take any parameters.
Return Value
The lower() method returns the lowercase string from the given string. It converts all uppercase characters to lowercase. If no uppercase characters exist, it returns an original string.
Example 1: How to convert uppercase string to lowercase in Python
To convert uppercase string to lowercase string, use the string.lower() method.
string = "EXPECTO PATRONUM"
print("Original String:", string)
lower_case = string.lower()
print("Lowercase String:", lower_case)Output
Original String: EXPECTO PATRONUM
Lowercase String: expecto patronumIt is a straightforward example that needs no explanation.
Example 2: String with Alphanumeric Characters
str = "MLM20 MLM30"
print("Original String:")
print(str)
print("\nConverted String:")
print(str.lower())Output
Original String:
MLM20 MLM30
Converted String:
mlm20 mlm30
How to check if a string is in lowercase
To check if a string is in lowercase in Python, you can use the “string.islower()” method. The islower() method returns a True or False boolean value.
string = "Avada Kedavra"
print(string.islower())Output
FalseIt returns False because the input string’s first character is uppercase.
Comparison of strings using the lower() method
str1 = "MLM20 MLM30"
str2 = "mlm30 mlm20"
if (str1.lower() == str2.lower()):
print("Strings are same")
else:
print("Strings are not same")
Output
Strings are not sameThat’s it.
Krunal Lathiya is a seasoned Computer Science expert with over eight years in the tech industry. He boasts deep knowledge in Data Science and Machine Learning. Versed in Python, JavaScript, PHP, R, and Golang. Skilled in frameworks like Angular and React and platforms such as Node.js. His expertise spans both front-end and back-end development. His proficiency in the Python language stands as a testament to his versatility and commitment to the craft.
