Error: The operation yail-divide cannot accept the arguments: , [[]], [0]

MIT App Inventor Help
8

Use these :

blocks
blocks906×208 25.8 KB

blocks (1)
blocks (1)1364×638 96.6 KB

Make sure that the textboxes have only "numbers" in them. You might want to enable the "Numbers Only" property.

Also, I used my MathTools extension here to get the average.

You can drag the blocks to Blocks Area.

First, this procedure makes a list of the values from the textbox.

Then it sends the list to the extension block to get the Average.