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  • depends very much on which machine you are running on and the compilers involved. You may be surprised to learn than on IBM mainframes a single character flag with "Y" or "N" is the most efficient way to implement boolean logic. Commented Apr 24, 2012 at 2:34
  • 4
    Of note, if (i = 1) is probably the very wrong thing to have in one's code. Commented Mar 2, 2014 at 3:06