Answer:
The function written in python is as follows:
def EvenNumbers(x, y):
if (y < x):
return
if (y % 2 == 0):
EvenNumbers(x, y - 2)
else:
EvenNumbers(x, y - 1)
if (y % 2 == 0):
print(y)
Explanation:
x represents the lower limit while y represents the upper limit.
So, the recursion will be repeated as long as x <= y
This defines the function
def EvenNumbers(x, y):
This checks if y < x. If yes, the recursion stops execution and return to the main
<em> if (y < x): </em>
<em> return </em>
The following if and else condition checks determines the appropriate range of the recursion.
<em> if (y % 2 == 0): </em>
<em> EvenNumbers(x, y - 2) </em>
<em> else: </em>
<em> EvenNumbers(x, y - 1) </em>
The above takes care of printing starting at x + 1 if x is odd
This checks and prints the even numbers in the range
<em> if (y % 2 == 0): </em>
<em> print(y)</em>
<em />
To call the function from main, make use of
EvenNumbers(x, y)
Where x and y are integers
e.g EvenNumbers(2,10), EvenNumbers(1,17), EvenNumbers(3,21)
<em>See attachment</em>
