Write a C program to calculate pow(x,n) | GeeksforGeeks



Time Complexity of optimized solution: O(logn)
Let us extend the pow function to work for negative y and float x.

/* Extended version of power function that can work
 for float x and negative y*/
#include<stdio.h>
 
float power(float x, int y)
{
    float temp;
    if( y == 0)
       return 1;
    temp = power(x, y/2);      
    if (y%2 == 0)
        return temp*temp;
    else
    {
        if(y > 0)
            return x*temp*temp;
        else
            return (temp*temp)/x;
    }
}

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