Python: Determine whether variable is defined or not

Python Basic: Exercise-121 with Solution

Write a Python program to determine if a variable is defined or not.

Sample Solution:

Python Code:

# Try to execute a block of code.
try:
  x = 1
except NameError:
  print("Variable is not defined....!")
else:
  print("Variable is defined.")

# Try to execute another block of code that references an undefined variable.
try:
  y
except NameError:
  print("Variable is not defined....!")
else:
  print("Variable is defined.")
  

Sample Output:

Variable is defined.                                                                                          
Variable is not defined....!

Flowchart:

Python Code Editor:

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