I created a simple login form using firebase.
Now on second screen user needs to enter a Code from which 7th and 13th number is extracted and printed on a label together like 20.
If user enters another code then same thing happens again but added in previous value like 20+50= 70. So 70 is printed in label.
And how can i same for individual user like
User1 logins and only his data is printed on the label
If jack has any data available already it prints on layout 2 label under Rs.
If no then jack enters code when Enter is pressed then text at index 7th and 13th is extracted and gets printed on label. If another codes is entered again then it add to previous number.
I just started using app inventor. I watched a lot of tutorials but they didn't helped alot.