Java/Others/RootPrecision.java at dev · primary-code-test/Java · GitHub

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package Others;

import java.util.Scanner;

public class RootPrecision {

public static void main(String[] args) {

// take input

Scanner scn = new Scanner(System.in);

// N is the input number

int N = scn.nextInt();

// P is precision value for eg - P is 3 in 2.564 and 5 in 3.80870.

int P = scn.nextInt();

System.out.println(squareRoot(N, P));

scn.close();

}

public static double squareRoot(int N, int P) {

// rv means return value

double rv;

double root = Math.pow(N, 0.5);

// calculate precision to power of 10 and then multiply it with root value.

int precision = (int) Math.pow(10, P);

root = root * precision;

/*typecast it into integer then divide by precision and again typecast into double

so as to have decimal points upto P precision */

rv = (int) root;

return rv / precision;

}