List can't be change by normal for loop.why??

Question

i=input().split()

for n in i:
n=n.title()
print(i)# no change in string list

for n in range(len(i)):
i[n]=i[n].title()
print(i)# change

Can anyone explain me why???

Answer 1

for n in i
just checks if n is in i, then
n=n.title assign new value to n ,it makes no changes to original list whatsoever

While i[n]=i[n].title()
Changes the value at n index of list i