$rounded = int ( $orig + 0.5 ) assumes $rounded is positive.
More generally:  use POSIX; $rounded = floor ( $orig + 0.5 )
or $rounded = sprintf( "%.f" , $orig ) to properly handle the half-way case
See also `perldoc -q round`

In reply to Re: Answer: How do I round a number? by I0
in thread How do I round a number? by Anonymous Monk

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