Calculating sum of values in dataframe column

Problem

Given a dataframe with three columns, write a code to calculate the sum of the values in the third column.
Input:
df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]})
Output:
24

Solution

This solution is in Python. Our A.I. can create solutions in multiple languages.

kayakane

# Solution:

df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]})

# The optimal solution is to use the sum() function on the third column of the dataframe.

df['C'].sum()

# This is optimal because it is the most efficient way to calculate the sum of the values in the third column.