[Leetcode] [JavaScript] SQRT (x)

Source: Internet
Author: User
Tags square root

SQRT (x)

Implement int sqrt(int x) .

Compute and return the square root of X.


For mathematics has already returned to the teacher of me, prescribe really kneel.

Check it Out is Newton iterative method (what a ghost.)

First guess a number, I guess one-third, and then apply the formula.

Candidate = (candidate + x/candidate)/2;

The title asks for an int, and my accuracy is 0.01.

Chanelton Iterative method It's interesting to see an article on the way.


1 /**2 * @param {number} x3 * @return {number}4  */5 varMYSQRT =function(x) {6     varcandidate = X/3;7      while(Math.Abs (X-candidate * candidate) > 0.01){8Candidate = (candidate + x/candidate)/2;9     }Ten     returnparseint (candidate);  One};

[Leetcode] [JavaScript] SQRT (x)

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