Usage of 'expr' command

subu_s · 12-03-2004, 01:06 AM

Hi friends,
Wld be a very basic question for most of you.

I need to use expr to do something like '10 / 20 * 100' and the result should be 50

expr gives me a syntax error .

Pls. help.

Regds,
Subu

subu_s · 12-03-2004, 01:17 AM

Seems that I had not escaped the operators '*' and '/'
Is working fine now

chrism01 · 12-03-2004, 01:23 AM

Bash (prob all shells) only does integer maths. You'll need to use the bc tool to get the right answer.
eg:
t=$((10/20*100))
echo $t
0

would be the same with expr eg
t=`expr 10 / 20`
echo $t
0

....