Which function is used to insert an item at a specific position in a list?

Which function is used to insert an item at a specific position in a list?

• A. add()
• B. insert()
• C. append()
• D. extend()

Answer: (B)

The function used to insert an item at a specific position in a list is the insert() function. This function allows you to specify not just the item you want to add but also the exact index at which you want to add it. For example, if you have a list and you want to insert an item at index 2, you can call the insert() function with two arguments: the index and the item you wish to insert. This capability makes insert() particularly useful for situations where the order of elements and their specific locations within the list are important. In contrast, the add() function does not exist for lists in Python. The append() function is used to add an item to the end of a list, which does not allow for positioning within the list. The extend() function is used to add multiple items from another iterable to the end of the list, also not providing the ability to specify an index for insertion. Therefore, insert() is uniquely suited for modifying list contents at specific indices.

The function used to insert an item at a specific position in a list is the insert() function. This function allows you to specify not just the item you want to add but also the exact index at which you want to add it. For example, if you have a list and you want to insert an item at index 2, you can call the insert() function with two arguments: the index and the item you wish to insert. This capability makes insert() particularly useful for situations where the order of elements and their specific locations within the list are important.

In contrast, the add() function does not exist for lists in Python. The append() function is used to add an item to the end of a list, which does not allow for positioning within the list. The extend() function is used to add multiple items from another iterable to the end of the list, also not providing the ability to specify an index for insertion. Therefore, insert() is uniquely suited for modifying list contents at specific indices.