What does "return true" do in this part of code?


Hi all. I want to know what does "return true" do in the following object prototype code? It's after the scan method. Thanks.

var cashRegister = {
    //Dont forget to add your property
    lastTransactionAmount: 0,
    add: function(itemCost) {
        this.total +=  itemCost;
        this.lastTransactionAmount = itemCost;
    scan: function(item,quantity) {
        switch (item) {
        case "eggs": this.add(0.98 * quantity);break;
        case "milk": this.add(1.23 * quantity); break;
        case "magazine": this.add(4.99 * quantity);break;
        case "chocolate": this.add(0.45 * quantity);break;
        return true;
    //Add the voidLastTransaction Method here
    voidLastTransaction: function() {
        this.total -= this.lastTransactionAmount



//Void the last transaction and then add 3 instead
//Show the total bill
console.log('Your bill is '+cashRegister.total);


Raise this question a lot, for one.

It gives a defined return value to the caller, for another.

What purpose it serves in the present construct is a bit of a mystery due to missing support logic. We could add a line that would give meaning to this,

default: return false;

At least this way the function is returning one or the other boolean. But how do we use this infomation?


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