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Difference between Even- and Odd-Index Sums

ZipRecruiter● EasyNEW GRADOA

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Problem statement

Using zero-based indexing, sum values at even indices and values at odd indices. Return evenSum - oddSum.

Function

indexParityDifference(values: int[]) → int

Examples

Example 1

values = [1,2,3,4]return = -2

Even-index sum four minus odd-index sum six gives negative two.

Example 2

values = [7]return = 7

Index zero contributes to the even sum.

Constraints

0 <= values.length <= 100000
-100 <= values[i] <= 100