Hello, I've been tinkering with MIT App inventor and it was a lot of fun. But of course I've some misunderstanding about some usage of the blocks. Especially when I am doing list involving indexes. As for example, I have a list of number {1,0,1,1} and as suppose its indexes are (in order) {1,2,3,4}.…

You used the wrong for each block type. AI2 does not do a good job of offering the for each number block up from the palette. Here are corrected blocks, draggable [calculate] [Capture] and proof it works.

Index of same items in a list

MIT App Inventor Help

Anke September 20, 2020, 10:13pm 12

As @MohamedTamer said, try this:

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