Learn by doing. The while loop is used to repeatedly execute a block of codes when the control condition is true. For example:

>>>

n = 5

while n > 0:

print(f"n is {n}, greater than zero.")

n -= 1

Type this code in pythontutor.com and see how the program is executed.

Now here is the quiz question.

Given two odd integers a and b, and ensure a < b.

You are asked to find out the sum (s) of all the even integers between a and b.

For example, a = 7 and b = 15. The even integers between a and b are 8, 10, 12 and 14.

So the sum of those numbers s = 8+10+12+14 = 44.

Write a code to find the sum by given a = 153 and b = 1025.

Key in a number for your result only in the answer box.