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Java.math.BigInteger.bitLength() Method
Description
The java.math.BigInteger.bitLength() returns the number of bits in the minimal two's-complement representation of this BigInteger, excluding a sign bit. For positive BigIntegers, this is equivalent to the number of bits in the ordinary binary representation. It computes (ceil(log2(this < 0 ? -this : this+1))).
Declaration
Following is the declaration for java.math.BigInteger.bitLength() method.
public int bitLength()
Parameters
NA
Return Value
This method returns number of bits in the minimal two's-complement representation of this BigInteger, excluding a sign bit.
Exception
NA
Example
The following example shows the usage of math.BigInteger.bitLength() method.
package com.tutorialspoint; import java.math.*; public class BigIntegerDemo { public static void main(String[] args) { // create 2 BigInteger objects BigInteger bi1, bi2; // create 2 int objects int i1, i2; // assign values to bi1, bi2 bi1 = new BigInteger("7"); bi2 = new BigInteger("-7"); // perform bitlength operation on bi1, bi2 i1 = bi1.bitLength(); i2 = bi2.bitLength(); String str1 = "Result of bitlength operation on " + bi1 +" is " +i1; String str2 = "Result of bitlength operation on " + bi2 +" is " +i2; // print i1, i2 values System.out.println( str1 ); System.out.println( str2 ); } }
Let us compile and run the above program, this will produce the following result −
Result of bitlength operation on 7 is 3 Result of bitlength operation on -7 is 3
java_math_biginteger.htm
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