Will my compiler ignore useless code?

Question

I\'ve been through a few questions over the network about this subject but I didn\'t find any answer for my question, or it\'s for another language or it doesn\'t answer totally

Answer 1

The loop can't be removed, the code is not dead, for instance:

  // Just some function, right?
  private static Double[] SomeFunctionThatReturnDoubles() {
    return null;
  }

  ...
  double[] TestRunTime = SomeFunctionThatReturnDoubles();
  ...
  // You'll end up with exception since TestRunTime is null
  for (int j = 0; j < TestRunTime.Length; j++)
  {
  }
  ...

Usually, compiler just can't predict all possible outcomes of SomeFunctionThatReturnDoubles and that's why it preserves the loop