Let's explore the second technique for adding a column to a DataFrame. This method utilizes the insert() function. Here's the syntax:

• dataframe: The name of the existing DataFrame;
• insert(): The function used for adding new columns;
• column_index: The position where the new column will be inserted (keep in mind that indexing starts at 0);
• column_name: The name for the new column;
• [value_1, value_2, value_3]: The values that will populate the new column.

Now let's turn our attention to the countries DataFrame. We'll demonstrate how to add a new column named population, representing the populations of countries, right after the first column (country).

Note

A key benefit of the insert() method is that it allows you to specify the position of the new column within the DataFrame.