Calculating Average Grades and Functions

The video tutorial guides viewers through creating a program to manage and average grades. It starts with setting up a list to hold grades and an 'Add Grade' button. The tutorial explains how to add grades to the list and update the display. It covers calculating averages using local variables for sum and count, ensuring they reset with each event. The tutorial concludes with finalizing the code to display the average grade.

What is the primary purpose of the add grade button in the code setup?

• To sort the grades in ascending order

• To delete grades from the list

• To reset all grades to zero

• To add new grades to the list

What happens when you click the add grade button?

• It clears all grades from the list

• It adds the typed grade to a variable and updates the list

• It updates the screen with a new layout

• It removes the last grade from the list

What is the role of the update screen function?

• To calculate the average of grades

• To print the final results into the grades label

• To reset the grades list

• To add a new grade to the list

Why is it necessary to average the grades?

• To sort the grades in descending order

• To determine the overall performance

• To remove duplicate grades

• To find the highest grade

Why are local variables used instead of global variables in this context?

• To increase the speed of the program

• To ensure they are accessible throughout the program

• To refresh their values every time the average grade button is clicked

• To make them permanent across sessions

What is the purpose of the 'sum' variable?

• To store the highest grade

• To keep a running total of all grades

• To count the number of grades

• To store the average grade

How is the sum of grades calculated?

• By dividing the total by the number of grades

• By multiplying all grades together

• By adding each new grade to the running total

• By subtracting each grade from the total

What happens to the count variable each time a grade is added?

• It resets to zero

• It decreases by one

• It remains the same

• It increases by one

How is the average grade calculated?

• By subtracting the count from the sum

• By dividing the sum by the count

• By adding the sum and the count

• By multiplying the sum by the count

What is the final step to display the average grade?

• Reset the sum and count variables

• Add a new grade to the list

• Set the text of the average grade label

• Clear the grades list