其他分享
首页 > 其他分享> > 50. Pow(x, n)(js)

50. Pow(x, n)(js)

作者:互联网

50. Pow(x, n)

Implement pow(xn), 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));
};

 

标签:Pow,number,param,50,Input,Output,js,Example,2.00000
来源: https://www.cnblogs.com/xingguozhiming/p/10428476.html