Shell Programming and Scripting

For comparing numeric values you may use the -eq operator and there no need to enclose the variable holding numeral in quotes.

Code:

if [ "$end_ct" = "END CAT" ] && [ $emtr_cnt -eq 1 ]; then
echo $end_ct
else
echo "value not found"
fi

have made changes into the below code as suggest:

Code:

if [ "$end_ct" -eq "END CAT" ] && [ $emtr_cnt -eq 1 ]; then

but now it is giving error "bravo_main_refresh.sh: test: unknown operator ----------"

For the first condition to match string use "=" instead of "-eq" like I posted above.

but when i am using = in the first condition then it is giving error "bravo_main_refresh.sh: test: unknown operator ----------"

now my condition is like the following:

Code:

if [ "$end_ct" -eq "END CAT" ] || [ $emtr_cnt -eq 1 ]; then

i have changed && to ||, and its working properly now.

It may be working, but it is not working properly.

When comparing strings, use the = operator; when comparing numbers, use the -eq operator.

If you want the then code to run only when both conditions are TRUE, use the && operator to separate the test commands. If you want the then code to run when either or both conditions are TRUE, use the || operator to separate the test commands.

So, you need:

Code:

if [ "$end_ct" = "END CAT" ] || [ $emtr_cnt -eq 1 ]; then
        or
if [ "$end_ct" = "END CAT" ] && [ $emtr_cnt -eq 1 ]; then

You said you were adding a condition, but you never said whether you require both conditions to evaluate to TRUE or if you only require one of the conditions to evaluate to TRUE.

i actually don't know the difference between && and ||. can you please elaborate.

test1 && test2 evaluates to TRUE if test1 evaluates to TRUE and test2 evaluates to TRUE. (Note that test2 won't be evaluated if test1 evaluates to FALSE.)

test1 || test2 evaluates to TRUE if test1 evaluates to TRUE or test2 evaluates to TRUE, or both evaluate to TRUE. (Note that test2 won't be evaluated if test1 evaluates to TRUE.)