How can I check if a variable is empty or not in tcsh Shell?

Question

IF I have to check that if a variable is empty or not for that in bash shell i can check with the following script:

if [ -z \"$1\" ] 
then
    echo \"variabl         


        

Answer 1

EDIT: see comment below.

if ( $?1 ) then
    echo "variable is empty"
else 
    echo "variable contains $1"
endif