# range
# 2.x :  list
# 3.x : object of type range
# iterable:
#	gives values one after another
#	at some points, says thats the end
#	- keep all values ready; give one when asked for
#	- make them when asked for

print (range(5)) 
print (list(range(5))) # 0 to 5; 5 not inclusive
print (list(range(5, 10))) # 5 6 7 8 9 
print (list(range(5, 20, 3))) # 5  8 11 14 17
# range(final) # init = 0, step = 1
# range(init, final)
# range(init, final, step)