What is the formula of index?

Assuming a hypothetical scenario where row 0 is considered valid (which is not standard practice), the function would theoretically attempt to retrieve the value in the second column of the "zero-th" row. In reality, the INDEX function would either return an error or, depending on the application's interpretation, might behave unexpectedly.

For educational purposes, let's interpret the first function call as a hypothetical case where it aims to access the second column of the first row, despite the incorrect row number. In this case, the result would be 2, as it's the value found in the first row, second column of the array.

The INDEX function is a versatile tool in spreadsheet applications, allowing users to retrieve specific values from a given array or range of cells. In the context of Example 2, the function is utilized to extract data from a predefined array.

Moving on to the second function call, =INDEX({1,2;3,4},2,2), this time with valid inputs. The function now correctly specifies the second row (2) and second column (2) of the array. This ensures a straightforward and expected outcome.

The array in this example is defined as {1,2;3,4}, representing a 2x2 matrix with values 1 and 2 in the first row and 3 and 4 in the second row. This format is commonly used in functions that require matrix or array input.