title: Python: Jumping back to the first line
body: <p>I just started learning python and wanted to try coding a VERY basic stock game.</p>
  
  <p>So far I am able to buy/sell stocks and repeat these orders through a loop but I want to get back to the first line, where I am asking whether I want to buy or sell stocks. I tried doing it with a loop but I didn't really succeed. Any ideas on how i can get back to this line: </p>
  
  <pre><code>order = input('Do you want to buy or sell?')
  </code></pre>
  
  <p>What I have so far:</p>
  
  <pre><code># Ordering and selling Stocks.
  depot = {'aapl': [20, 400.0]} # amount, volume
  cash = 20*20
  order_book = {} #Stock, Price, Amount, Ordertype, Volume --&gt; Key = timestamp?
  
  #start menu: Buying or selling?
  
  order = input('Do you want to buy or sell? ')
  backtooptions = 'n'
  while backtooptions == 'n':
      #buying stocks
      if order == "Buy" or order == 'buy':
          dstock = str(input('What stock do you want to buy? Enter ID!'))
          #buying stock if stock is in depot
          if dstock in depot:
              dprice = float(input('What price?'))
              damount = int(input('How many?'))
              volume = dprice*damount
              if cash &gt;= volume:
                  order_book[dstock] = dstock, dprice, damount, 'Buy', volume
                  depot[dstock][0] += damount
                  depot[dstock][1] += volume
                  cash -= volume
                  print('You just bought',order_book[dstock][2],'stocks of',
                        order_book[dstock][0],'worth', order_book[dstock][4],'€', 'at a price of', order_book[dstock][1],'€.')
                  print (depot)
                  print (cash)
                  backtooptions = input('Do you want to go back to the menu?[y/n]')
  
              else:
                  print('You do not have enough money!')
                  backtooptions = input('Do you want to go back to the menu [y] or change your order[n]?')
          #buying stocks if stock is not in depot
          else:
              dprice = float(input('What price?'))
              damount = int(input('How many?'))
              volume = dprice*damount
              if cash &gt;= volume:
                  depot[dstock] = [damount, dprice, volume]
                  order_book[dstock] = [dstock, dprice, damount, 'Buy', volume]
                  cash -= volume
                  print('You just bought',order_book[dstock][2],'stocks of',order_book[dstock][0],'worth', order_book[dstock][4],'€', 'at a price of', order_book[dstock][1],'€.')
                  print (depot)
                  print (cash)
                  backtooptions = input('Do you want to go back to the menu?[y/n]')
  
              else:
                  print('You do not have enough money!')
                  backtooptions = input('Do you want to go back to the menu [y] or change your order[n]?')
  
  
  
  
      #selling stocks
      elif order == 'Sell' or order == 'sell':
          dstock = str(input('What stock do you want to sell? Enter ID!'))
          dprice = float(input('What price?'))
          damount = int(input('How many?'))
          #Do we have enough stocks?
          if damount &lt;= depot[dstock][0]:#
              volume = damount*dprice
              order_book[dstock] = [dstock, dprice, damount, 'Sold', volume]
              depot[dstock][0] -= damount
              depot[dstock][1] -= volume
              cash += volume
              print('You just sold',order_book[dstock][2],'stocks of',order_book[dstock][0],'worth', order_book[dstock][4],'€', 'at a price of', order_book[dstock][1],'€.')
              print (depot)
              print (cash)
              backtooptions = input('Do you want to go back to the menu?[y/n]')
              volume = dprice*damount
  
  
          else:
              print('You do not have enough stocks to sell!')
              backtooptions = input('Do you want to go back to the menu [y] or change your order[n]?')
  
      else:
          print('Error!')
          backtooptions = input('Do you want to go back to the menu?[y/n]')
  </code></pre>
  
  <p>I am aware that a lot of my code is still very inefficient or stupid I am just trying to test what I've learnt so far and in this post I really only want to know about getting back to</p>
  
  <pre><code>order = input('Do you want to buy or sell?')
  </code></pre>