I am creating an type of calculator with app inventor.
It consists of numerous buttons & 10 blank TextBoxes (numbers only).
All Textboxes can be used for inputting numbers or showing calculated results.
The user will type in numbers in a few of the blank textboxes, then click on Button1 & the remaining Textboxes will show the results.
I've got the math working ok, but if a Textbox is blank when Button1 is pressed I get an error.
I am trying to use an "If" block & I would like the test to detect if the textbox is blank.
Anybody know how I can do this, or suggest an alternative solution?
Thank you
K
It consists of numerous buttons & 10 blank TextBoxes (numbers only).
All Textboxes can be used for inputting numbers or showing calculated results.
The user will type in numbers in a few of the blank textboxes, then click on Button1 & the remaining Textboxes will show the results.
I've got the math working ok, but if a Textbox is blank when Button1 is pressed I get an error.
I am trying to use an "If" block & I would like the test to detect if the textbox is blank.
Anybody know how I can do this, or suggest an alternative solution?
Thank you
K