bash and strings

graziano1968 · 10-01-2004, 06:32 AM

Hi

I am writing with bash a simple program (I am not an expert of bash).

why

#a=`expr 1 / 2`;echo "$a"

return 0 , instead of 0.5 ?

Thank you!

majalee · 10-01-2004, 07:24 AM

hi,

expr does not handle decimals.. what u will have to do is this :

$ a=`echo 1/2 | bc -l`; echo $a

and the result will be :

.50000000000000000000

enjoy !!

majalee

graziano1968 · 10-01-2004, 07:50 AM

Quote:

Originally posted by majalee
hi,

expr does not handle decimals.. what u will have to do is this :

$ a=`echo 1/2 | bc -l`; echo $a

and the result will be :

.50000000000000000000

enjoy !!

majalee

great thanks !