On Oct 20, 2005, at 9:07, Franklin wrote:
I am a real beginner of perl. after looking for Internet for serveral
hours, I still can't find the answers for my problem. My question is:
Which function I can use to get 2 digits after point for a variable?
For example, for $j=2.56789, how can I get the very first two digits
after points,ie, I just want to get 2.56.
The usual idioms are printf() and sprintf(), inherited from C:
$j = 2.56789;
printf "%.2f", $j; # -> 2.57
Note that the number has been rounded. Note also we get always two
digits after the dot, even if $j has less:
$j = 3;
printf "%.2f", $j; # -> 3.00
Is that helpful?
-- fxn
PS: See perldoc -f printf, perldoc -f sprintf, and man 3 printf.
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