Dear R.N.,
> On 31 Aug 2016, at 18:32, R.N. Tsai <[email protected]> wrote:
>
> Dear GAP forum,
> Is there a way to do a formatted print in GAP?
> Something equivalent to this for example : %6d or %-6d to print an
> alignedfixed width 6 bit integer....(these are c examples but are used in
> other languages too).
> Thanks,R.N.
Not that I am aware of (maybe utility function in some package though?) but you
can easily achieve this using String, or PrintString or ViewString -
dependently on the objects that you want to output this way. For example, this
is a simple-minded attempt to add some number of spaces in front of an integer
(it uses undocumented feature that ListWithIdenticalEntries returns an empty
list when its 1st argument is negative):
gap> PrintFormatted:=function(d,n)
> local t,s;
> t:=String(d);
> s:=ListWithIdenticalEntries(n-Length(t),' ');
> Print(s,t);
> end;
function( d, n ) ... end
gap> for i in [1..16] do PrintFormatted(2^i,4);Print("\n");od;
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65536
gap>
Hope this helps
Alexander
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