JavaScript Function,Object

💥A JavaScript function is defined with the function keyword, followed by a name, followed by parentheses ()

The code to be executed, by the function, is placed inside curly brackets: {}

👊function name(parameter1, parameter2, parameter3) {
    code to be executed
}

💥 We can use function different ways

 👊<script>
function myFunction() {
    document.getElementById("demo").innerHTML = "Hello World!";
}
myFunction();

 👊<script>
function myFunction(name) {
    return "Hello " + name;
}
document.getElementById("demo").innerHTML = myFunction("John");
</script>

💥OBJECT

👊 <script>
var person = {
    firstName : "John",
    lastName  : "Doe",
    age       : 50,
    eyeColor  : "blue"
};

document.getElementById("demo").innerHTML =
person.firstName + " is " + person.age + " years old.";
</script>
 
output  John is 50 years old

 👊<script>
var person = {
    firstName: "John",
    lastName : "Doe",
    id       : 5566,
    fullName : function() {
       return this.firstName + " " + this.lastName;
    }
};

document.getElementById("demo").innerHTML = person.fullName();
</script>

output  John Doe