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App Inventor 2 minusing value by the whole contents of a list

I was wondering if there was a way to minus one value by the contents of the whole list in App Inventor.

For example if list1 = [4, 5, 4, 5] and I want to do let's say the subtraction of 7 - 4 - 5 - 4 - 5, how could I do this in App Inventor 2?

Solution

  • Write a procedure to sum up the list and then calculate 7 - sumOfList like this

    enter image description here

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