It is a block of code designed to perform a particular task when called.
Syntax:
A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses () which is optional.
function name(parameter1, parameter2, parameter3) {
// code to be executed
// return something;
}
Functions often compute a return value. The return value is "returned" back to the "caller".
When JavaScript reaches a return statement, the function will stop executing.
Let us understand with an example.
let x = myFunction(1, 2);
function myFunction(a, b) {
// Function returns the sum of a and b
return a + b;
}
console.log('sum is ==> '+x);
Output:
sum is ==> 3
