Below is my program, a.sh :
A=10 B=20 C=0 D=1 for var in {A,B,C,D} do if [ $var = 0 ] then echo "$var value is 0" else echo "Ok" fi done Result is :
# sh a.sh Ok Ok 0 value is 0 <==== Instead of this I want "C value is 0" Ok How can we do this ?
With bash:
A=10 B=20 C=0 D=1 for var in A B C D; do if [ ${!var} -eq 0 ]; then echo "$var value is 0" else echo "Ok" fi done Use -eq to compare integer values (or use (( ${!var} == 0 )) or (( !${!var} )) which is the same thing), and use ${!var} to get the value of the variable whose name is stored in the variable var.
Or, a bit neater but essentially the same (still in bash):
for var in A B C D E; do case ${!var} in 0) printf '%s value is 0\n' "$var" ;; *) echo 'Ok' ;; esac done This treats the values as strings, not as integers.
