Take Instagram for exampleTo like ❤️ a picture on Instagram, you do not alter the code. You just tap the button, and it count it as a like. It is because, there is a connection 🔗 between the front end (button) and the back end (code). This connection is set in terms of “if” and “then” scenarios. “If” your press the like button, “then” the like count increases by +1. This code is set and it is stored in the Instagram server. If this code is stored in many computers across globe, then we’re ta...