50. Pow(x, n)

Medium

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7.6K

Implement pow(x, n), which calculates `x`

raised to the power `n`

(i.e., `x`

).^{n}

**Example 1:**

Input:x = 2.00000, n = 10Output:1024.00000

**Example 2:**

Input:x = 2.10000, n = 3Output:9.26100

**Example 3:**

Input:x = 2.00000, n = -2Output:0.25000Explanation:2^{-2}= 1/2^{2}= 1/4 = 0.25

**Constraints:**

`-100.0 < x < 100.0`

`-2`

^{31}<= n <= 2^{31}-1`n`

is an integer.- Either
`x`

is not zero or`n > 0`

. `-10`

^{4}<= x^{n}<= 10^{4}

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