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

Ajay Yadav
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Ajay Yadav
Full Stack JavaScript Techdegree Graduate 18,261 Points

hey something went wrong

where is the problem. help please

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

  },
  divide: function(value) {

  },
  clear: function() {
    this.sum = 0;
  }, 
  equals: function() {
    return this.sum;
  }
}

1 Answer

Jennifer Nordell
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STAFF
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Jennifer Nordell
Treehouse Teacher

Hi there! You have an unneeded line which is declaring a new variable named subtract. Then you are subtracting the value from this new variable. The subtract function is meant to subtract the value from the sum variable which was declared at the beginning. Check the add function for an example.

Give it another shot with these hints in mind! :sparkles: