BigInteger floatValue() Method in Java

Last Updated : 04 Dec, 2018

The java.math.BigInteger.floatValue() converts this BigInteger to a float value. If the value returned by this function is too big for a magnitude to represent as a float then it will be converted to Float.NEGATIVE_INFINITY or Float.POSITIVE_INFINITY as appropriate. There is a chance that this conversion can lose information about the precision of the BigInteger value. Syntax:

public float floatValue()

Returns: The method returns a float value which represents float value for this BigInteger. Examples:

Input: BigInteger1=32145
Output: 32145.0
Explanation: BigInteger1.floatValue()=32145.0.

Input: BigInteger1=32145535361361525377
Output: 3.2145535E19
Explanation: BigInteger1.floatValue()=3.2145535E19. This BigInteger is too big 
for a magnitude to represent as a float then it will be converted to 
Float.NEGATIVE_INFINITY or Float.POSITIVE_INFINITY as appropriate.

Below programs illustrate floatValue() method of BigInteger class: Example 1:

Java

// Java program to demonstrate floatValue() method of BigInteger

import java.math.BigInteger;

public class GFG {

    public static void main(String[] args)
    {

        // Creating 2 BigInteger objects
        BigInteger b1, b2;

        b1 = new BigInteger("32145");
        b2 = new BigInteger("7613721");

        // apply floatValue() method
        float floatValueOfb1 = b1.floatValue();
        float floatValueOfb2 = b2.floatValue();

        // print floatValue
        System.out.println("floatValue of "
                           + b1 + " : " + floatValueOfb1);
        System.out.println("floatValue of "
                           + b2 + " : " + floatValueOfb2);
    }
}

Output:

floatValue of 32145 : 32145.0
floatValue of 7613721 : 7613721.0

Example 2: When return float is too big for a magnitude to represent as a float.

Java

// Java program to demonstrate floatValue() method of BigInteger

import java.math.BigInteger;

public class GFG {

    public static void main(String[] args)
    {
        // Creating 2 BigInteger objects
        BigInteger b1, b2;

        b1 = new BigInteger("32145535361361525377");
        b2 = new BigInteger("7613721535372632367351");

        // apply floatValue() method
        float floatValueOfb1 = b1.floatValue();
        float floatValueOfb2 = b2.floatValue();

        // print floatValue
        System.out.println("floatValue of "
                           + b1 + " : " + floatValueOfb1);
        System.out.println("floatValue of "
                           + b2 + " : " + floatValueOfb2);
    }
}

Output:

floatValue of 32145535361361525377 : 3.2145535E19
floatValue of 7613721535372632367351 : 7.6137214E21

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

BigInteger doubleValue() Method in Java

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