Evaluate the algorithm with a trace table

Question

Prize calculator by

Integer number1= 1

Integer number2= 7

Do

number2 = number2 + 3

If number2 = 10

Display "You have won a prize"

number2=0

EndIf

number1=1-1

Loop Until number1 <> 0

Answer 1

number1	number2	DISPLAY
1	7
1	10	You have won a prize
1	0
0	0
0	3
-1	3

Trace table as above. The table records any change to the integer variables and any display produced.

The algorithm goes through the loop statement twice. In that process number2 becomes 10 once, causing the display.