# File: scope3.py
#
# A failed attempt at altering the value
# of n, because n is local in inc().
#

def inc(x):
   n = n + 1
   return n 

n = 3
print(inc(n))
print("n = ", n)

'''
Output from the program:

Traceback (most recent call last):
  File "scope3.py", line 7, in <module>
    print(inc(n))
  File "scope3.py", line 3, in inc
    n = n + 1
UnboundLocalError: local variable 'n' referenced before assignment

'''