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Expert Developer JavaScript Interview Question:
What are undeclared and undefined variables?
Submitted by: MuhammadUndeclared variables are those that do not exist in a program and are not declared. If the program tries to read the value of an undeclared variable, then a runtime error is encountered.
Undefined variables are those that are declared in the program but have not been given any value. If the program tries to read the value of an undefined variable, an undefined value is returned.
Submitted by: Muhammad
Undefined variables are those that are declared in the program but have not been given any value. If the program tries to read the value of an undefined variable, an undefined value is returned.
Submitted by: Muhammad
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