How to pass Int type data from Activity to Activity in Android Studio?

Question

Android

I need to make sure that in each new activity the sum of the variable from the past activity is added to the current variable. And so time after time. Please tell me how can I do this (I understand, a very stupid question, I'm just a beginner in the field of application development for android studio).

Answer 1

Intent nextActivityIntent = Intent(this, (имя_текущего_класса_Activity).class)
nextActivityIntent.putExtra(YOUR_INTEGER)
startActivity(nextActivityIntent)