in reply to Reduce from 2 to 0.1.

How about this then? 
#!/usr/local/bin/perl5 -w
use strict;

for (my $i = 20 ; $i >= 1 ; $i -= 1){
  printf "%f\n", $i/10;
}

[download]
It produces nice output: 
2.000000
1.900000
1.800000
1.700000
1.600000
1.500000
1.400000
1.300000
1.200000
1.100000
1.000000
0.900000
0.800000
0.700000
0.600000
0.500000
0.400000
0.300000
0.200000
0.100000

[download]
But it's a rather horrible solution, really... :-)

Replies are listed 'Best First'.
Re: Re: Reduce from 2 to 0.1.
by riffraff (Pilgrim) on Apr 10, 2001 at 20:21 UTC
    Whenever I needed decimals, to a specific number of places (and not a variable number of places), then I used an int scaled up the appropriate amount,then used a printf("%d.%d",i/100,i%100); (or whatever the scale was) to print.

    This avoided FPU use (way back when when FP was really, really slow), and avoided rounding errors.

    Of course, if you have a variable amount of decimal places, this might not be feasible.

    -lsd

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