lower(): all lower case letters.

my_str='Welcome to Plus2net'
output=my_str.lower()
print(output)                # welcome to plus2net

my_str='WELCOME TO PLUS2NET'
output=my_str.lower()
print(output)                # welcome to plus2net

my_str='welcome to plus2net'
output=my_str.lower()
print(output)                # welcome to plus2net

Handling Strings with Special Characters

When applying lower() to strings with numbers or special characters, only alphabetic characters are affected:

my_str = "Hello123!@#"
print(my_str.lower())  # Output: "hello123!@#"

Use Case: Normalizing User Input

When comparing user inputs, converting strings to lowercase ensures case-insensitive comparisons:

input_str = "Yes"
if input_str.lower() == 'yes':
    print("Input accepted.")

Input accepted.

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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