# Variables are scoped
# It is only available from inside region it is created
def myfunc():
print("Inside function")
x = 300
print(x)
print("Exiting function")
# 300
myfunc()
# Next line fails
#print(x)
print("----")
# This sequence sets and displays a variable
# It then calls a function which *looks* like it messes with same variable
# But it shows that when we exit the function,
# the variable is intact
x = 7
# 7
print(x)
# From inside function, we will see 300
myfunc()
# 7
print(x)
print("=======")
# This shows that outer variables can be accessed from inner regions
# Define a global variable
outer = "my outer variable"
def myfunc():
inner = "my inner variable"
# Works as expected - we can see both
print(outer)
print(inner)
myfunc()
print("<><><><><><><>")
# Use global keyword to declare a variable global from within an inner region
def myfunc():
global surprise
surprise = 777
myfunc()
# the surprise variable is now treated as a global
# 777
print(surprise)
print("<><><><><><><>")
# We can change global variables from within an inner region
# by using the global keyword
x = 300
def myfunc():
global x
x = 200
myfunc()
# 200
print(x)
