Question

How to calculate square root (or floor square if not perfect square) of an integer in Java

Answer 1

public class MyClass {
    public static  int sqrt_(int n) { 
        if (n == 0 || n == 1) 
            return n; 
      
        int i = 1, sq = 1; 
        
        while (sq <= n) { 
          i++; 
          sq = i * i;
        } 
        return i - 1; 
    } 
    public static void main(String args[]) {
        System.out.println(sqrt_(9));
        System.out.println(sqrt_(5));
        System.out.println(sqrt_(26));
        System.out.println(sqrt_(16));
    }
}



/*
run:

3
2
5
4

*/

 

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