What is the difference between " while 1" and "while true", Should I use one over the other?

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NeGM
NeGM 2022-7-26
编辑： James Tursa 2022-7-26
I'd like to know the difference between while 1 and while true and in which cases I should use one over the other. Thank you

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James Tursa
James Tursa 2022-7-26
编辑：James Tursa 2022-7-26
1 is a double class scalar and true is a logical class scalar, so the check for "non-zero" is slightly different for each even though they both accomplish the same thing. For all we know the parser might even optimize this away into a simple GOTO at the end of the loop. But since you are using the value in a logical context, using true probably makes more sense. I suppose checking a 1-byte integer value in the background (logical) might be ever so slightly faster than checking an 8-byte floating point value in the background (double) also, although for an interpreted language like MATLAB I doubt you could tell the difference in timing.

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