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JavaScript

Posted by Marcelo Retana
Marcelo Retana
2,534 Points

I need to calculate a perimeter with pure JS

I need to define a new method on line 8, calcPerimeter, which calculates and returns the perimeter for a Rectangle in terms of height and width.

The hint that was given to me is:

Use calcArea as a guide to code up calcPerimeter. Remember that a rectangles perimeter is all four sides added together, or 2 * height + 2 * width.

When referring to a rectangle's properties, be sure to use this.propertyName:

I tried in some different ways but I couldn't get it***

And here the code:

function Rectangle(height, width) {
  this.height = height;
  this.width = width;
  this.calcArea = function() {
      return this.height * this.width;
  };
  // put our perimeter function here!
function calcPerimeter() {
    return 2 * this.height + 2 * this.width;
    }
}

var rex = new Rectangle(7,3);
var area = rex.calcArea();
var perimeter = rex.calcPerimeter();

1 Answer

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,108 Points

Make sure that it's a method:

this.calcPerimiter = function() {
   // return statement
}
Marcelo Retana
Marcelo Retana
2,534 Points

Yisus, it works already, THANK YOU!!!

Marcelo Retana
Marcelo Retana
2,534 Points

Yisus, it works already, THANK YOU!!!