The while statement, example 2 (2)

# program with a while loop
n = 0
while n < 20:
  print n,
  n = n+1
print "The value of n after the loop is:", n

will print:

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
The value of n after the loop is: 20