# 107. Find the largest difference

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Given an array of numbers, pick any two numbers `a`

and `b`

, we could get the difference by `Math.abs(a - b)`

.

Can you write a function to get the largest difference?

```
largestDiff([-1, 2,3,10, 9])
// 11, obviously Math.abs(-1 - 10) is the largest
largestDiff([])
// 0
largestDiff([1])
// 0
```