Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Ajay Yadav
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Ajay Yadav
Full Stack JavaScript Techdegree Graduate 18,261 Points
Posted by Ajay Yadav
.a{fill-rule:evenodd;}techdegree seal-36
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
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
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: