Help! Loops

[bwdu]

Hi everyone!I am curious about if i can write this code using for loop

Yes

if yes could you give me some hints?

make an attempt, and show where you need help -- hint

while ...:
    ...

n = int(sys.argv[1])
p = 1
b = []
for i in range(2,n+1,2):
    b += [i]

a = b[-1]/2
print(a)