s4.py

#range()
a=range(1,10,5)
print (type(a))#Output:<class 'range'>
#Converting range(iterable) into iterator object using iter() function.
b=iter(a)
print (b)#Output:<range_iterator object at 0x0303E650>
print (type(b))#Output:<class 'range_iterator'>


#Applying next() over the iterator.
#Returns one element at a time.
print (next(b))#Output:1
print (next(b))#Output:6