Loops

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   * Is the loop entered from the top?
   * Is initialization code directly before the loop?
   * If the loop is an event loop, is it constructed cleanly rather than
     using a kludge such as for i:= 1 to 9999?
   * If the loop is a C for loop, is the loop header reserved for
     loop-control code?
   * Does the loop use begin and end or their equivalents to prevent
     problems arising from improper modifications?
   * Does the loop have something in it? Is it not empty?
   * Are housekeeping chores grouped, either at the beginning or the end of
     the loop?
   * Does the loop perform one and only one function, like a well-defined
     routine?
   * Does the loop end under all possible conditions?
   * Is the loop's termination condition obvious?
   * If the loop is a for loop, does the code inside it avoid monkeying
     with the loop index?
   * Is a variable used to save important loop-index values rather than
     using the loop index outside the loop?
   * Does the loop use safety counters, if you have a safety-counter
     standard?
   * If the loop is nested, does it use loop names for clarity?
   * Is the loop index an ordinal type or enumerated type?
   * Does the loop index have a meaningful name?
   * Does the loop avoid index cross talk?
   * Is the loop short enough to view all at once?
   * Is the loop nested to three levels or less?
   * If the loop is long, is it especially clear?

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