syntax error

Shell Programming and Scripting
1

whats wrng with the following

max_opt=$(expr ${std_cnt} + ${alt_cnt})

it says expr : syntax error

pls help,its urgent

2

Hi,
before this line you must have to define some value for the variables
std_cnt and alt_cnt. It show this error, if any one is missed.

please check it,

Ex:
------------------------------
std_cnt=5;
alt_cnt=5;

max_opt=$(expr ${std_cnt} + ${alt_cnt})
echo $max_opt
----------------------------------
it will give the o/p: 10

3

Place the following in the first line of the script:

#!/bin/ksh
4

Presumably, you tried to perform integer arithmetic on variables that do not contain integers.

If they contain numbers with decimal fractions, use a tool that can process fractions; expr doesn't.

If you can use KornShell93, try:

max_opt=$(( $std_cnt + $alt_cnt ))

Otherwise:

max_opt=$( awk "{ print $std_cnt + $alt_cnt }" )