BigDecimal pow() method in Java with Examples - GeeksforGeeks

12 Apr, 2019
The java.math.BigDecimal.pow(int n) method is used to calculate a BigDecimal raise to the power of some other positive number passed as parameter (this)n. This method performs raises this BigDecimal number to the power of the positive number passed as the parameter.
Syntax:
public BigDecimal pow(int n)

Parameters: This method accepts a parameter n which is the exponent to which we want to raise the power of BigDecimal number.
Returns: This method returns a BigDecimal which is equal to (this)n.
Exception: The parameter n must be in the range 0 through 999999999, inclusive otherwise ArithmeticException is thrown
Below programs illustrate the pow() method of BigDecimal class
Example 1:
// Java program to demonstrate// pow() method of BigDecimal  import java.math.BigDecimal;  public class GFG {    public static void main(String[] args)    {        // Creating BigDecimal object        BigDecimal b1            = new BigDecimal("924567");          // Exponent or power        int n = 5;          // Using pow() method        BigDecimal result = b1.pow(n);          // Display result        System.out.println("Result of pow operation "                           + "between BigDecimal "                           + b1 + " and exponent "                           + n + " equal to "                           + result);    }}
Result of pow operation between BigDecimal 924567 and exponent 5 equal to 675603579456764176151564447607
Example 2:
// Java program to demonstrate// pow() method of BigDecimal  import java.math.BigDecimal;  public class GFG {    public static void main(String[] args)    {        // Creating BigDecimal object        BigDecimal b1            = new BigDecimal("457863");          // Exponent or power        int n = 4;          // Using pow() method        BigDecimal result = b1.pow(n);          // Display result        System.out.println("Result of pow operation "                           + "between BigDecimal "                           + b1 + " and exponent "                           + n + " equal to "                           + result);    }}
Result of pow operation between BigDecimal 457863 and exponent 4 equal to 43948311905876729579361
Example 3: Program showing exception when exponent passed as parameter is less than zero.
// Java program to demonstrate// pow() method of BigDecimal  import java.math.BigDecimal;  public class GFG {    public static void main(String[] args)    {        // Creating BigDecimal object        BigDecimal b1            = new BigDecimal("10000");          // Negative power        int n = -1;          try {            // Using pow() method            BigDecimal result = b1.pow(n);              // Display result            System.out.println("Result of pow operation "                               + "between BigDecimal "                               + b1 + " and exponent "                               + n + " equal to "                               + result);        }        catch (Exception e) {            System.out.println(e);        }    }}
java.lang.ArithmeticException: Invalid operation
Reference: https://docs.oracle.com/en/java/javase/12/docs/api/java.base/java/math/BigDecimal.html#pow(int)
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