Kindly , i want arduino code simulator for free..to run the code step by step please
The code simulator can be an Arduino that uses RAM to store the program. The Due board has 96K bytes of RAM so that is enough to hold a program. The flash memory would hold the single step control program, but it also is able to use serial IO to transfer a second program to RAM. The RAM then is used to execute its code without burning any more flash memory. This allows rapid code testing and single stepping while never changing the flash memory.
Try typing "arduino simulator" into google...