Function A function is a block of code that has a name and can be called to execute a specific set of statements, as well as allowing code reuse. Create a function type_data name_function() { // the command that will be executed when the function is called } Example : void address() { print('Japan, 〒150-0013 Tokyo, Shibuya City, Ebisu'); } Call function name_function (); Example : void main() { address(); } image 1 function output Function with parameter Parameters are used to send data into a function so that the function can use that value in its operations. Writing example: Data_type name_function (data-type_name_parameter) { ''the command to be executed when the function is called } Example : void multiplication(int x, int y) { int z = x * y; print(z); } void main() { multiplication(9, 9); } image 2 function with parameters output Function with return A function that returns a value after performing its operation Writing example: Data_typename_function (data-type_name_parameter) { ''the command to be executed when the function is called return value; } Example: int multiplication(int x, int y) { return x * y; } void main() { var result = multiplication(7, 7); print(result); } image 3 function with return output