challenge-334/eric-cheung/python/ch-1.py


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## Example 1
## arrInts = [-2, 0, 3, -5, 2, -1]
## nX = 0
## nY = 2

## Example 2
## arrInts = [1, -2, 3, -4, 5]
## nX = 1
## nY = 3

## Example 3
## arrInts = [1, 0, 2, -1, 3]
## nX = 3
## nY = 4

## Example 4
## arrInts = [-5, 4, -3, 2, -1, 0]
## nX = 0
## nY = 3

## Example 5
arrInts = [-1, 0, 2, -3, -2, 1]
nX = 0
nY = 2

print (sum(arrInts[nX:nY + 1]))