how to delete a single value using delete button in a calculator app?

Issue

I am making an Android Calculator App. I want to delete an input instead of clearing the whole value. This is code for adding values

private void updateText(String value) {
        output = output + value;
        display.setText(output);
    }

How can I delete a single value using the delete button?strong text

Solution

Try this

private String removeLastChar(@NonNull  String value){
  return value.substring(0,value.length()-1);
}

Note: Input value must non-null. So check before passing

Answered By - Gobu CSG