When you loop in an array like you did, your for variable(in this example i
) is current element of your array.
For example if your ar
is [1,5,10]
, the i
value in each iteration is 1
, 5
, and 10
.
And because your array length is 3, the maximum index you can use is 2. so when i = 5
you get IndexError
.
You should change your code into something like this:
for i in ar:
theSum = theSum + i
Or if you want to use indexes, you should create a range from 0 ro array length - 1
.
for i in range(len(ar)):
theSum = theSum + ar[i]