Write a python program to calculate the sum of numbers from 1 to 20 which is divisible by 3.

Its all  useless we should stop doing everything digitally

I’d say platform as a service (paas) or application platform as a service (apaas) or platform base service is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.