Something like this?
use warnings;
use strict;

while(<DATA>){
    printf("%d  %04.2f  %3d\n",split())
}

__DATA__
1  0.4 2 
1  0.2  -5  
1  0.1  -18  
1  0.11 7  
0 0.13  10 
0  0.22  11

[download]
Produces:
1  0.40    2
1  0.20   -5
1  0.10  -18
1  0.11    7
0  0.13   10
0  0.22   11

[download]
Or maybe investigate format.

In reply to Re: Keeping one colmun fixed and second column changed at different intervals to print the output by cdarke
in thread Keeping one colmun fixed and second column changed at different intervals to print the output by vis1982

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