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You can, of course, insert the expression shown
in Segment 382 into a method such that messages based on that
method, when sent to Array instances containing numbers, add up the
numbers in the array. There is no need for a variable, such as
Calories, however; self names the array:
Array method definition • instance sumUp | sum | sum := 0. self do: [:element | sum := sum + element]. ^ sum Workspace Transcript show: (Array with: 570 with: 720 with: 640 with: 720) sumUp printString Transcript 2650