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Same code gives different answers in 2 different scripts
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Same code gives different answers in 2 different scripts


  • Subject: Same code gives different answers in 2 different scripts
  • From: rob <email@hidden>
  • Date: Mon, 01 Jun 2009 17:19:35 -0700

This might be my best AS stumper yet. I have a situation where the
IDENTICAL code gives different answers in two different scripts.

Here's the code:

property form_height : ((1.75 - 0.7) * 72) --=75.6

to findRound of num given numDecimals:n
	set x to 10 ^ n
	return (((num * x) + 0.5) div 1) / x
end findRound

set rounded_height to findRound of form_height given numDecimals:2


When run in a Script Editor window by itself, this gives the expected
result of 75.6 (apparently trailing zeroes are trimmed).

This very same code, when incorporated in a larger script, gives the result
75.59999999999999. None of its parameters are touched by any other part of
the program.

The program gets the right answer when rounding other numbers.

Why won't it round a simple number? Why does it give a wrong answer?
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