How do you make a string lowercase in Python?

• A. Using the upper() method
• B. Using the lower() method
• C. Using the capitalize() method
• D. Using the strip() method

Answer: (B)

The lower() method is specifically designed to convert all characters in a string to their lowercase equivalent. When you apply this method to a string, it processes each character and transforms uppercase letters into lowercase letters, while leaving any lowercase letters and non-alphabetic characters unchanged.

For example, if you have the string "Hello World", applying the lower() method would return "hello world". This is a straightforward and effective way to ensure that any string is entirely in lowercase, making it particularly useful for tasks such as case-insensitive comparisons or formatting data consistently.

The other methods listed are intended for different purposes: the upper() method converts a string to uppercase, the capitalize() method only capitalizes the first character of the string while making all the others lowercase, and the strip() method is used for removing leading and trailing whitespace from a string. Thus, none of these methods would achieve the goal of transforming a string entirely to lowercase, confirming that the choice of lower() is indeed the correct approach for this specific task.