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Java BigInteger Class | add() Method with Example

BigInteger Class add() method: Here, we are going to learn about the add() method of BigInteger Class with its syntax and example.
Submitted by Preeti Jain, on May 10, 2020

BigInteger Class add() method

• add() method is available in java.math package.
• add() method is used to add the given BigInteger (val) to this BigInteger [i.e. (this BigInteger) + (BigInteger val)].
• add() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• add() method does not throw an exception at the time of adding an object.

Syntax:

    public BigInteger add(BigInteger val);

Parameter(s):

• BigInteger val – represents the object is to add with this object.

Return value:

The return type of this method is BigInteger, it returns BigInteger and its value is calculated by using [(this BigInteger) + (BigInteger val)].

Example:

// Java program to demonstrate the example 
// of BigInteger add() method of BigInteger

import java.math.*;

public class AddOfBI {
    public static void main(String args[]) {
        // Initialize two variables str1 and str2
        String str1 = "20";
        String str2 = "80";

        // Initialize two BigInteger objects 
        BigInteger b_int1 = new BigInteger(str1);
        BigInteger b_int2 = new BigInteger(str2);

        System.out.println("b_int1: " + b_int1);
        System.out.println("b_int2: " + b_int2);

        // add this BigInteger b_int1 with the given
        // BigDecimal b_int2 and store the result in 
        // a variable named add_val
        BigInteger add_val = b_int1.add(b_int2);
        System.out.println("b_int1.add(b_int2): " + add_val);
    }
}

Output

b_int1: 20
b_int2: 80
b_int1.add(b_int2): 100