check if variable is undefined python code example
Example 1: js if not undefined
if (typeof myVar !== "undefined") {
console.log("myVar is DEFINED");
}
Example 2: check if variable is empty python
if variable:
Example 3: python check if value is undefined
try:
thevariable
except NameError:
print("well, it WASN'T defined after all!")
else:
print("sure, it was defined.")
Example 4: javascript check if undefined or null
// simple check do the job
if (myVar) {
// comes here either myVar is not null,
// or myVar is not undefined,
// or myVar is not '' (empty string).
}