DB<1> print sprintf "%.2f", 10/3;
3.33

##</code><code>##

  DB<2> printf "%.2f", 10/3
3.33

##</code><code>##

$ perl -e 'printf "%.2f\n", $_/20 for 1..10'
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50

##</code><code>##

$ perl -e 'printf "%.1f\n", $_/20 for 1..10'
0.1
0.1
0.1
0.2
0.2
0.3
0.3
0.4
0.5
0.5