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BigInteger clearBit() Method in Java

  • Last Updated : 24 Jun, 2021
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Prerequisite: BigInteger Basics
The clearBit() method returns a BigInteger which is used to clear a particular bit position in a BigInteger. The bit at index n of binary representation of BigInteger will be cleared means converted to zero. Mathematically we can say that it is used to calculate this & ~(1<<n).
Syntax: 
 

public BigInteger clearBit(int n)

Parameter: The method takes one parameter n which refers to the index of the bit needed to be cleared.
Return Value: The method returns the BigInteger after clearing the bit position n.
Throws: The method might throw an ArithmeticException when n is negative.
Examples: 
 

Input: value = 2300, index = 3
Output: 2292
Explanation:
Binary Representation of 2300 = 100011111100
bit at index 3 is 1 so clear the bit at index 3 
Now Binary Representation becomes 100011110100
and Decimal equivalent of 100011110100 is 2292

Input: value = 5482549, index = 0
Output: 5482548

Below program illustrate the clearBit(index) method of BigInteger(). 
 

Java




/*
*Program Demonstrate clearBit() method of BigInteger
*/
import java.math.*;
 
public class GFG {
 
    public static void main(String[] args)
    {
 
        // Creating  BigInteger object
        BigInteger biginteger = new BigInteger("5482549");
 
        // Creating an int i for index
        int i = 0;
 
        // Call clearBit() method on bigInteger at index i
        // store the return BigInteger
        BigInteger changedvalue = biginteger.clearBit(i);
 
        String result = "After applying clearbit at index " +
        i + " of " + biginteger+" New Value is " + changedvalue;
 
        // Print result
        System.out.println(result);
    }
}
Output: 
After applying clearbit at index 0 of 5482549 New Value is 5482548

 

Reference:https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html#clearBit(int)
 

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