Business Intelligence with Microsoft Power BI - with Material - Writing a Simple M Code

The video tutorial provides a step-by-step guide on using Power Query in Power BI. It begins with creating a blank query and writing simple M code to perform basic arithmetic operations. The tutorial explains how to view and modify the output using the advanced editor, and addresses common errors. It concludes by demonstrating how to finalize the output and encourages further exploration of more complex functions in M language.

What happens to unused variables in the Power Query editor?

Describe how to change the final output variable from C to B.