Which built-in function is used to find the length of a sequence (such as a string or list) in Python? count() length() len() size()

To find the length of a sequence such as a string or list in Python, the built-in function that is used is len(). This function returns the number of items in a sequence.

Here’s a brief explanation of the other options you mentioned:

1. count(): This function is used to count the occurrences of a specific value in a string or list, not to find the length.

2. length(): There is no built-in function named length() in Python for finding the length of sequences.

3. size(): The function size() is not a built-in function in Python. However, in libraries such as NumPy, it can be used to get the size of an array.

Final Answer

The correct answer is len().