Function Return Statements

    // food prices
    var beer_cost = 6.75; 
    var burger_cost = 5.00; 
    var pop_cost = 3.00;
    
    // user’s money
    var account_balance = 15.75;

    // check account balance function checkBalance(amt){
        if (account_balance - amt >= 0) { 
            return true;
        } else {
            console.log ('INSUFFICIENT FUNDS')
            return false;
        }
    }

    // drink beer
    function drink_beer() {
        if (checkBalance(beer_cost) {
        account_balance = account_balance - beer_cost;
        console.log ('Enjoy your beer.')
        }
        console.log('\tBalance:', account_balance.toFixed(2)); //escape character used to shift balance to the right
    }
    
    // eat burger
    function eat_burger() {
        if (checkBalance(burger_cost) {
            account_balance = account_balance - burger_cost;
            console.log ('Enjoy your burger.')
        }
        console.log('\tBalance:', account_balance.toFixed(2)); 
    }
    
    // drink pop
    function drink_pop(){
        if (checkBalance(pop_cost) {
            account_balance = account_balance - pop_cost;
            console.log ('Enjoy your pop.')
        }
        console.log('\tBalance:', account_balance.toFixed(2));
    }
    
    // visit carnival, eat, and drink
    var mealList = [drink_beer, drink_pop, eat_burger, drink_beer]; 
    function visitCarnival (mList, msg) {
        for(var i=0, num=mList.length; i<num; i++){ 
            mList[i]( );
        }
    }

    // calling function
    visitCarnival(mealList, "Hello");