BigDecimal precision() Method in Java

The java.math.BigDecimal.precision() method returns the precision of this BigDecimal. The precision refers to the number of digits in the unscaled value. Syntax:

public int precision()

Parameters: This method does not accept any parameters. Return Value: This method returns an integer which denotes the precision of this BigDecimal object. Examples:

Input : 198.176
Output : 6

Input : 721111.111
Output : 9

Below programs illustrate the java.math.BigDecimal.precision() function in Java: Program 1:

Java

import java.math.*;
import java.io.*;

class GFG {
    public static void main(String[] args)
    {
        // create 2 BigDecimal Objects
        BigDecimal b1, b2;

        // Assigning values to b1, b2
        b1 = new BigDecimal("198.176");
        b2 = new BigDecimal("721111.111");

        // Display their respective precision
        System.out.println("The precision of " + b1 + " is " + b1.precision());
        System.out.println("The precision of " + b2 + " is " + b2.precision());
    }
}

Output:

The precision of 198.176 is 6
The precision of 721111.111 is 9

Program 2:

Java

// Java program to illustrate
// precision() Function
import java.math.*;
import java.io.*;

class GFG {
    public static void main(String[] args)
    {
        // Creating a BigDecimal Object
        BigDecimal num;

        // Assigning value 0.1 + 0.1 + 0.1 to num
        num = new BigDecimal("0.1")
                  .add(new BigDecimal("0.1"))
                  .add(new BigDecimal("0.1"));

        // Display the BigDecimal value and its precision
        System.out.println("The precision of " + num + " is "
        + num.precision());
    }
}

Output:

The precision of 0.3 is 1

Reference: https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#precision()

BigDecimal precision() Method in Java

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