C squareRoot calculation

Issue

This Content is from Stack Overflow. Question asked by Andreas Steffensen

I needed a square root approximation in C so i looked this post: Squareroot approximation (C) . and got this following implementation:

float x = n;
float y = 1;
float e = 0.001; // Accuracy level
if (n == 0)
    return 0;
while ((x - y) > e)
{
    x = (x + y) / 2;
    if (n == 0 || x == 0)
        return 0;
    y = n / x;
}
return x; 

Can anyone help me find the time complexity of this.
And if i have to much strain on the processor?



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