Calculator works

I've been for awhile now trying to figure out how I can make a an average button for my calculator emulator. Been having ideas with making a list and so on to make it as an actual averager as in a actual calculator. If anyone can help me with this I'd gladly appreciate it.

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Initialize a global list called stack, to create empty list.

In the Clear All button, set global stack to empty list.

Have a numeric text box, and an Enter button.

In the Enter button, insert textbox.Text before position 1 of Stack.

Code a value procedure list_to_lines to take a list input, 

run it thru a list to csv block, text replace all commas with \n ,

and return the result.

Each time you change the stack, show its lines conversion in a label.

(optional).

Code a sum() value procedure that takes a list input,

uses a local variable subtotal initially 0,

and a do-result block that returns subtotal.

 In the do block, code a for each item in list

      set subtotal to subtotal + item

When the Average  button is pressed,

show sum(stack)/length of list(stack).

ABG

FAQ:

https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/mitappinventortest/2cd6Uz__xA0/cPQSiZpcDAAJ

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I'm having a hard time understanding the procedure to follow by your steps, I've been trying to figure this out for a while now sorry. 

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See the Books and Tutorials section of the FAQ.

Look for the "How to" link in the FAQ also.

Then post a downloaded image of your blocks here.

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See attached for an average procedure.

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