Introduction to Functions in JavaScript

    // 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;
    
    // drink beer
    function drink_beer() {
        account_balance = account_balance - beer_cost; 
        console.log(account_balance);
    }
    
    // eat burger
    function eat_burger() {
        account_balance = account_balance - burger_cost; 
        console.log(account_balance);
    }
    
    // drink pop
    function drink_pop(){
        account_balance = account_balance - pop_cost; 
        console.log(account_balance);
    }
    
    // calling functions 
    drink_beer(); 
    drink_pop(); 
    drink_pop(); 
    eat_burger();