$ echo 'x=y=1.2; x+=1.1; x-=1.1; x; y; x==y' |bc |xargs echo 1.2 1.2 1 #### $ perl -wle '$x=$y=1.2; $x+=1.1; $x-=1.1; $,=$"; print $x, $y, $x == $y' 1.2 1.2