Why i am getting Nan

Question

Trying to calculate BMI using the following code:

var mark = {
  fullName: 'John Cartor',
     Weight : 90,
     height : 1.59,
     calcBMI: function(){
        this.bmi= this.weight / (this.height* this.height);
       return this.bmi;
     }
};

john.calcBMI();
mark.calcBMI();

console.log(john, mark);

But I'm getting Not a number error.

Answer 1

I'm not sure what youre trying to achieve but you can try this:

 var mark = { fullName: 'John Cartor', weight: 90, height: 1.59, calcBMI: function(){ this.bmi= this.weight / (this.height* this.height); return this.bmi; } }; console.log(mark.calcBMI());

Property Weight should be weight and then you can call the method calcBMI() .

I'm showing you this approach as you've hard coded all the values. So, in this case it is pretty straight forward.