50. Pow(x, n)
Implement pow(x, n), which calculates x raised to the power n (xn).
Example 1:
Input: 2.00000, 10 Output: 1024.00000
Example 2:
Input: 2.10000, 3 Output: 9.26100
Example 3:
Input: 2.00000, -2 Output: 0.25000 Explanation: 2-2 = 1/22 = 1/4 = 0.25题意:实现指数函数代码如下:
/** * @param {number} x * @param {number} n * @return {number} */ var myPow = function(x, n) { if(n==0){ return 1; } if(n<0){ n=-n; x=1/x; } return (n%2===0)?myPow(x*x,n/2):x*myPow(x*x,parseInt(n/2)); };
原文地址:https://www.cnblogs.com/xingguozhiming/p/10428476.html
时间: 2024-10-13 00:06:24