how to refer to global variable python code example

Example 1: global var in python

a = input('Hello: ')
if a == 'world':
  global b
  b = input('Here')
print b
#Prints the input for be as a result

Example 2: global in python

x = 5

def foo():
    global x = 10
    print("local x:", x)


foo()
print("global x:", x)