Says Mike: > bash shells can do: > > let a=$b+$c*$d > let a=($b+$c)*$d > > but if you want to ensure compatibility with Bourne shells like > ash, you should stick to: > > a=$(($b+$c*$d)) > a=$((($b+$c)*$d))
but if you want to ensure compatibility with Bourne shells like the Bourne shell :), you should stick to a=`expr $b + $c \* $d` a=`expr \( $b + $c \) \* $d` to complicate things, the spaces in the expression after `expr' are required. HTH, Eric -- E.L. Meijer ([EMAIL PROTECTED]) Eindhoven Univ. of Technology Lab. for Catalysis and Inorg. Chem. (SKA)
