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Array-1 > swapEnds
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Given an array of ints, swap the first and last elements in the array. Return the modified array. The array length will be at least 1.

swapEnds([1, 2, 3, 4]) → [4, 2, 3, 1]
swapEnds([1, 2, 3]) → [3, 2, 1]
swapEnds([8, 6, 7, 9, 5]) → [5, 6, 7, 9, 8]

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public int[] swapEnds(int[] nums) { }


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