Question

How to declare a real variable with at least 20 digits in Java

Answer 1

import static java.math.RoundingMode.HALF_UP;
import java.math.BigDecimal;
import java.math.MathContext;

public class Main {
    public static void main(String[] args) {
        String pi = "3.141592653589793238462643";
        
        MathContext m = new MathContext(25, HALF_UP);
        BigDecimal result = new BigDecimal(pi, m);

        System.out.println(result);
    }
}


/*
run:

3.141592653589793238462643

*/

 

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