CalculateSum is an operation that involves adding up multiple numbers together to obtain their total sum.
PrintArea is another operation, but instead of adding numbers together, it calculates and outputs the area of shapes.
Similar to calculateSum, this operation also involves outputting information onto some medium. However, instead of calculating sums, it prints out the total sum obtained from adding numbers together.
Sum refers to the result obtained when adding two or more numbers together. CalculateSum computes this value.