Android Marshmallow Location Permission handling

Question

I am working on Android Marshmallow runtime permissions. I asked user for location permission, suppose he has allowed to get the location and i have started getting location

Answer 1

    if (Build.VERSION.SDK_INT >= 23) {
       if (ContextCompat.checkSelfPermission(MainActivity.this, permission) != PackageManager.PERMISSION_GRANTED) {
    //here req again for Permission
    }
}