For example, consider the following code, int add(int, int); Here, a function named add is declared with 2 arguments of type int and return type int. … Difference between Definition and Declaration. DeclarationDefinitionA variable or a function can be declared any number of timesA variable or a function can be defined only onceDifference between Definition and Declaration – GeeksforGeeks www.geeksforgeeks.org › difference-between-definition-and-declaration