Answers for "bash check if variable is defined"

check if bash variable is undefined

if test -z "$var" 
then
      echo "$var is empty"
else
      echo "$var is NOT empty"
fi

Posted by: Guest on August-16-2021

check if variable is defined

try:
    thevariable
except NameError:
    print("well, it WASN'T defined after all!")
else:
    print("sure, it was defined.")

Posted by: Guest on May-29-2021

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