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hi welcome back in this video were going to talk about void functions an avoid function is a function that we use for its effect rather than to return a value so lets look at some examples lets look at one example so we want to display a greeting at certain points in our program so we can do that by defining our void function with keyword void followed by the name of the function and then we just have whatever we wanted to say here hello world so thats a very simple definition but you see the idea so then anywhere i want to display a greeting i simply call it like its the executable code itself so we should see on the screen is hello world and its that simple a void function can have a parameter just like a value returning function has so if we want to personalize our greeting a little bit we can add a parameter for the name so that its entered a name so we can say something like this so we pass a name into the function and its going to pick it up and display hello to that pers