The role of yield in Python??

Functions that contain yield statements are specifically compiled into generator functions, and when the function is called, they return a generator object that supports the iterator interface. The function may have a return statement, but its purpose is to yield the value. Examples are as follows:

1>>>def g (n):2      forIinchrange (n):3         yieldi**2;4 5         6>>> forIinchG5):7Print (I,":");8 9     Ten 0 : One 1 : A 4 : - 9 : -  - : the>>>

The role of yield in Python??