Check Google Play for app update programmatically

Is it possible to check Google Play programmatically to see if an update is available BEFORE continuing to run the app requiring update?

i.e.

1. Version 1 of app is currently installed;
   
2. start app but before it begins running main routines, it checks Google Play to see if an update is available but hasn't been downloaded or installed (This is due to the fact the device was just turned on and an automatic download/update could not have happened yet.);
   
3. Find there IS an...

Check Google Play for app update programmatically

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