checkedPow(long b, long k) is a method of Guava’s LongMath Class which accepts two parameters b and k and is used to find the k-th power of b.
Syntax:
public static long checkedPow(long b, long k)
Parameters: The method accepts two parameters, b and k. The parameter b is called base which is raised to the k-th power.
Return Value: This method returns the k-th power of b.
Exceptions: The method checkedPow(long b, long k) throws ArithmeticException if the k-th power of b overflows in signed long arithmetic.
Below examples illustrate the implementation of the above method:
Example 1:
// Java code to show implementation of// checkedPow(long b, long k) method of// Guava's LongMath class import java.math.RoundingMode;import com.google.common.math.LongMath; class GFG { // Driver code public static void main(String args[]) { long b1 = 5; int k1 = 7; // Using checkedPow(long b, long k) method // of Guava's LongMath class long ans1 = LongMath.checkedPow(b1, k1); System.out.println(b1 + " to the " + k1 + "th power is: " + ans1); long b2 = 19; int k2 = 4; // Using checkedPow(long b, long k) method // of Guava's LongMath class long ans2 = LongMath.checkedPow(b2, k2); System.out.println(b2 + " to the " + k2 + "th power is: " + ans2); }} |
Output:
5 to the 7th power is: 78125 19 to the 4th power is: 130321
Example 2:
// Java code to show implementation of// checkedPow(long b, long k) method of// Guava's LongMath class import java.math.RoundingMode;import com.google.common.math.LongMath; class GFG { static long findPow(long b, int k) { try { // Using checkedPow(long b, long k) method of // Guava's LongMath class // This should raise "ArithmeticException" as // b to the kth power overflows in // signed long arithmetic long ans = LongMath.checkedPow(b, k); // Return the answer return ans; } catch (Exception e) { System.out.println(e); return -1; } } // Driver code public static void main(String args[]) { long b = 20; int k = 25; try { // Function calling findPow(b, k); } catch (Exception e) { System.out.println(e); } }} |
Output:
java.lang.ArithmeticException: overflow
