How output is 3 ?

Question

x = 0
for i in range (2,20,3):
if i%2==0:
x+=1
print (x)

Please anybody explain how output is 3

Answer 1

Allamprabhu Hiremath
The range(2,20,3) == (2,5,8,11,14,17)
For each number in the range that is divisible by 2 without remainder, add 1 to x.
Since there are only 3 numbers in the range [2, 8, 14], x = 3.

Happy Coding 😀

Answer 2

Understand the code is testing for even numbers in the range from 2 to 20, but the step is 3, that is, each time the loop reiterates, i which started at 2 is increased by 3, until it reaches 20. So 2,5,8,11,14,17,20 has just 3 even numbers.
for idx in range (<<initialize>>, <<limit>>, <<step>>)