Why is the apple’s position 90 in the Unit 3 assessment? How can I explain this to my students.
Consider the following program (blocks and text)
What is the apple’s x position at the end of this program?
Hi dlgleason,
Even though the apple’s 
position is initially 20, it is then updated by the value of the banana 
, which is 60 and then added 30, giving you the resulting value of 90.
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By the way, welcome to our community! 
If they thought it was 100, the explanation would be that the computer does the computation line by line. When it gets to line 3 it replaces apple.x with the current value of banana.x, which is 60, +30. It does not look ahead to the final value of banana.x in line 4.