print("Specifying start, end and step")
for x in range(2,21,2): # start = 3, end = 21, step 2
print (x)
print("Mention only start and end")
for x in range(0,6): # start = 0, end = 6
print (x)
print("Mention only end")
for x in range(10): # end = 10
print (x)