CSC111 Exercises with Global Variables

--D. Thiebaut (talk) 15:57, 24 April 2014 (EDT)

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Case 1

A = 3 def f1( x ): print( "f1", x, A ) print( "A = ", A ) f1( 30 )

>>> A = 3 f1 30 3 >>>

Case 2

def f1( x ): print( "f1", x, A ) A = 3 print( "A = ", A ) f1( 30 )

>>> A = 3 f1 30 3 >>>

Case 3

A = 3 def f1( x ): print( "f1", x, A ) A = 5 print( "A = ", A ) f1( 30 ) print( "A = ", A )

>>> A = 3 Traceback (most recent call last): File "/Users/thiebaut/Desktop/PYTHON/globalExercises.py", line 8, in <module> f1( 30 ) File "/Users/thiebaut/Desktop/PYTHON/globalExercises.py", line 4, in f1 print( "f1", x, A ) UnboundLocalError: local variable 'A' referenced before assignment >>>

Case

A = 3 def f1( x ): global A print( "f1", x, A ) A = 5 print( "A = ", A ) f1( 30 ) print( "A = ", A )

>>> A = 3 f1 30 3 A = 5 >>>

Case

>>> >>>

Case

>>> >>>

Case

>>> >>>