How many times can I upload a program or sketch to my Arduino Uno Clone Board? I'm about to work on my very first project using arduino (I'm just about to buy one next week), and one of our professor says that we can only upload a program or sketch in an Arduino Uno Board for approximately 8 times. He also added that if we're using a clone version, it'll can only last for 2 sketch uploads. Is this true or is he bluffing? Thank you in advance.
He's talking complete and utter gibberish.  To quote from the ATMega328P datasheet:


  
  High Endurance Non-volatile Memory Segments
  
  
  32KBytes of In-System Self-Programmable Flash program
  Memory
  1KBytes EEPROM
  2KBytes Internal SRAM
  Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
  Data Retention: 20 years at 85°C/100 years at 25°C(1)
  Optional Boot Code Section with Independent Lock Bits
  
  
  In-System Programming by On-chip Boot Program
  True Read-While-Write Operation
  
  Programming Lock for Software Security
  
  


So you have at least 10,000 uses out of it before it starts to go flakey.