Note: In Tcl 8.6, format %b was introduced to perform this operation.
GPS 2003-12-04:
To convert a decimal number to a binary representation:
proc to.binary n {
incr n 0
set r {}
while {$n > 0} {
set r [expr {$n & 1}]$r
set n [expr {$n >> 1}]
}
return $r
}Example:
% to.binary 3 11 % to.binary 4 100 % to.binary 200 11001000
JPT:
Here's a recursive one-liner that could certainly be optimized:
proc to.binary n {expr {!$n ? 0 : [to.binary [expr {$n>>1}]][expr {$n&1}]}}AMG Here's another method:
proc to.binary {n} {
binary scan [binary format I $n] B* out
return [string trimleft [string range $out 0 end-1] 0][string index $out end]
}