I'm a little confused. Okay, I know that int does not round a number, it just lops off everything after the decimal. So, after reading some other posts here, I go with sprintf. Specifically, I need an integer and I want to correctly lop everything off after the decimal. Here's my formula:

$rounded=sprintf("%.0f",$unrounded); This works for most cases, but I'm getting some funny output from my script when the decimal is .5. Here is the verbose output from my script where it performs a calculation, tells me the unrounded number, and then tells me what the rounded number is:

(script output)
SO the equation to figure out sub trait A1 looks like this
7 + (2 - (0.5 * 9)) and comes up as 4.5
that is rounded to 4
SO the equation to figure out sub trait A2 looks like this
7 + (2 - (0.5 * 9)) and comes up as 4.5
that is rounded to 4
SO the equation to figure out sub trait A3 looks like this
7 + (5 - (0.5 * 9)) and comes up as 7.5
that is rounded to 8

So, my question is, why did it round DOWN for two cases, and round UP for one case?


-oakbox

In reply to Rounding With sprintf anomaly? by oakbox

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