Which of the following list methods returns the index of the first occurrence of a value?Answer areafind()search()index()locate()

Breaking Down the Problem

1. Identify the Functionality: We need to find which method from the list is used to return the index of the first occurrence of a specific value.
2. Examine the Options: The options provided are areafind(), search(), index(), and locate().

Relevant Concepts

1. List Methods: Python lists have specific methods that allow us to manipulate and retrieve data, including looking for indices.
2. First Occurrence: The goal is to find the method that locates the first index of a provided value within the list.

Analysis and Detail

1. areafind(): This is not a standard Python list method.
2. search(): This method does not exist for standard Python lists.
3. index(): This method returns the index of the first occurrence of a specified value. For example, in Python, if lst = [10, 20, 30, 20], then lst.index(20) will return 1.
4. locate(): This is also not a recognized method for Python lists.

Verify and Summarize

The only valid method from the options given that performs the required function is index().

Final Answer

The method that returns the index of the first occurrence of a value is index().