how we can call methods which are used in called function

**Dormilich** · Jul 7 '16, 12:55 PM

your functions don't make sense. from a sum() function anyone would expect that you pass in two values and get back their sum.

next, assigning the result is obviously not the responsibility of a calculation function.

and then there is the issue that the buttons do nothing at all.

**Sherin** · May 6 '20, 04:17 AM

Code:

function Product(name, price) {
  this.name = name;
  this.price = price;
}

function Food(name, price) {
  Product.call(this, name, price);
  this.category = 'food';
}

console.log(new Food('cheese', 5).name);

**lewish95** · May 9 '20, 04:33 PM

For a start, let’s teach the user to say hello:

Code:

let user = {
  name: "John",
  age: 30
};

user.sayHi = function() {
  alert("Hello!");
};

user.sayHi(); // Hello!

Here we’ve just used a Function Expression to create the function and assign it to the property user.sayHi of the object.

Then we can call it. The user can now speak!

A function that is the property of an object is called its method.

So, here we’ve got a method sayHi of the object user.

Of course, we could use a pre-declared function as a method, like this:

Code:

let user = {
  // ...
};

// first, declare
function sayHi() {
  alert("Hello!");
};

// then add as a method
user.sayHi = sayHi;

user.sayHi(); // Hello!

how we can call methods which are used in called function

how we can call methods which are used in called function

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