⭐ in reply to How do I print/round a number to a given number of decimal places?

Probably the easiest way is to use printf/sprintf: 

$unrounded = 0.66666;

printf "$unrounded rounded to 3 decimal places is %.3f\n", $unrounded;

$rounded = sprintf "%.2f", $a;  # rounded to 2 decimal places (0.67)

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