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# Help in Objects

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

}, divide: function(value) {

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

in this code,I've to implement subtract method,how to do?

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

},
divide: function(value) {

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

## 1 Answer

Hey sujan sharma,

In your subtract method you should subtract the given value from the property sum but you have used the method name itself instead of sum.

and please remove the property subtract:0 (line no 2) , since the name will conflict with the function subtract (line no 6).

Please check the subtract method below :)

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

},
divide: function(value) {

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