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JavaScript Object-Oriented JavaScript (2015) Introduction to Methods Finishing the Calculator

Ricard Taujenis
Ricard Taujenis
4,383 Points

Implement the subtract method.

have been putting different subtract methods should the method be placed inside of subtract function?

calculator.js
var calculator = {
  sum: 0,
  add: function(value) {
    this.sum += value;
  },
  subtract: function(value) {

  },
  multiply: function(value) {

  },
  divide: function(value) {

  },
  clear: function() {
    this.sum = 0;
  }, 
  equals: function() {
    return this.sum;
    var x = 10;
x += 5;
  }
}

1 Answer

Jeff Wilton
Jeff Wilton
16,646 Points

It looks like they did the add method for you:

add: function(value) {
    this.sum += value;
  },

so you need to do something similar for the subtract method:

subtract: function(value) {
    this.sum -= value;
  },