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Java BigInteger Class | subtract() Method with Example

BigInteger Class subtract() method: Here, we are going to learn about the subtract() method of BigInteger Class with its syntax and example.
Submitted by Preeti Jain, on May 12, 2020

BigInteger Class subtract() method

• subtract() method is available in java.math package.
• subtract() method is used to subtract the given value from the value of this BigInteger.
• subtract() 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.
• subtract() method does not throw an exception at the time of performing subtraction.

Syntax:

    public BigInteger subtract(BigInteger val);

Parameter(s):

• BigInteger val – represents the value to be subtracted from this BigInteger.

Return value:

The return type of this method is BigInteger, it returns BigInteger that holds the value subtracted the given val from the value of this object.

Example:

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

import java.math.*;

public class SubstractOfBI {
    public static void main(String args[]) {
        // Initialize two variables str1 str2 
        String str1 = "1245";
        String str2 = "100";

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

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

        // subtracts the given BigInteger (b_int2)
        // from this BigInteger (b_int1) i.e.
        // {b_int1 - b_int2}
        BigInteger sub_val = b_int1.subtract(b_int2);
        System.out.println("b_int1.subtract(b_int2): " + sub_val);
    }
}

Output

b_int1: 1245
b_int2: 100
b_int1.subtract(b_int2): 1145