Suppose I have a code block like,
for i in range(15):
print(i)
i+=5
I expect the i value at each iteration should be i = 0,5,10, ....
Even though I am changing the iterator inside the code block of for loop, the value is not affecting the loop.
Can anyone explain the functionality happening inside?
A for loop is like an assignment statement. i gets a new value assigned at the top of each iteration, no matter what you might do to i in the body of the loop.
The for loop is equivalent to
r = iter(range(15))
while True:
try:
i = next(r)
except StopIteration:
break
print(i)
i += 5
Adding 5 to i doesn't have any lasting effect, because i = next(r) will always be executed next.
As the others have said, range emits the number and your assignment doesn't matter.
To get the desired result use something like
for i in range(0, 15, 5):
print(i)
Here, you're defining i as a number from 0 to 14 everytime it runs the new loop. I think that what you want is this:
i = 0
for _ in range(/*how many times you want i to print out*/):
print(i)
i += 5
iby theforstatement at the start of each iteration. You can monkey withiinside the loop, but it'll always get reset to the next value from the iterator.for i in range(0, 15, 5): print(i)