Re: rounding to decimal place
Re: rounding to decimal place
- Subject: Re: rounding to decimal place
- From: Stefan Eriksson <email@hidden>
- Date: Sun, 9 Oct 2005 21:21:33 +0200
what is the best way to round numbers to the nearest decimal place?
1.123945565 to 1.124
The classic procedure is:
1) multiply by 1000 2) add 0.5 3) truncate to an integer 4) divide by 1000
But step 4 may introduce an "error" because 1/1000 is not exactly expressible as a floating point binary number. Figuring out how to tell AppleScript to print in a three decimal digit format is beyond my mental capacity. Perhaps inserting the decimal point into the character string that represents the integer at step 3.
Maybe this will help ?
Not my code so don´t thank me...
/ S
roundThis(75.5436123, 2) --> 75.54
on roundThis(n, numDecimals) set x to 10 ^ numDecimals (((n * x) + 0.5) div 1) / x end roundThis |
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