CODEWITHSUNDEEP
javascript
Dónal
Dónal

Reputation: 187529

simple object-oriented JavaScript example

I'm learning OO JavaScript (again). I've written this simple object

function circle(){
  this.radius = 4;
}

circle.prototype.area = function(){
  this.radius * this.radius * 3.14;
};

var c = new circle();
c.area();

The value returned by c.area() is undefined. I guess this can only because this.radius is not returning 4, why not?

Upvotes: 0

Views: 360

Answers (1)

duri
duri

Reputation: 15351

radius has the value of 4, but the area method doesn't return any value.

circle.prototype.area = function(){
  return this.radius * this.radius * 3.14;
};

Upvotes: 6

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