♦ JavaScript Function
♣ About JavaScript Function
A JavaScript Function is a block of code written to perform certain task.A JavaScript Function can give different kind of output depending upon the arguments it accepts.
A JavaScript Function can be invoked over and over again, i.e, this is one of cool features of function declaration.
♣ JavaScript Function Syntax
Below is the representation of JavaScript Function Syntax.Basic Syntax
function name_of_function(parameter1, parameter2, ...) { //can accept any number of parameters // code to be executed return value_return; //value that is to be returned }
Syntax Explanation:
name_of_function: name of the function parameter1, parameter2, ...: parameters for function value_return: return value, which will be returned upon completion of execution of function
♣ Example1: Function Call in JavaScript
Below shown is a simple function call, the function accepting two parameters and returning a number.In this example, Simple Function Call is illustrated.
Example
Input:
Output:
♣ Example2: Nested Function in JavaScript
Below is the illustration of function call from inside of other function.In this example, Nested Function Call is illustrated.
Example
Input:
Output: