Answers for "check if variable is defined"

javascript check if variable exists

if (typeof myVar !== 'undefined') {
    // myVar is defined
}

Posted by: Guest on July-23-2019

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

How can I check whether a variable is defined in Node Js

if (query){
   doStuff();
}

Posted by: Guest on May-22-2020

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