Java Guava | pow(int b, int k) method of IntMath Class

The method pow(int b, int k) of Guava’s IntMath class returns b to the kth power. Even if the result overflows, it will be equal to BigInteger.valueOf(b).pow(k).intValue(). This implementation runs in O(log k) time. Syntax:
```public static int pow(int b, int k)
```
Exception: The method pow(int b, int k) throws IllegalArgumentException if k < 0. Example 1:
 `// Java code to show implementation of ``// pow(int b, int k) method of Guava's ``// IntMath class `` ` `import` `java.math.RoundingMode; ``import` `com.google.common.math.IntMath; `` ` `class` `GFG { `` ` `    ``static` `int` `findPow(``int` `b, ``int` `k) ``    ``{ `` ` `        ``// Using pow(int b, int k) ``        ``// method of Guava's IntMath class ``        ``int` `ans = IntMath.pow(b, k); `` ` `        ``// Return the answer ``        ``return` `ans; ``    ``} `` ` `    ``// Driver code ``    ``public` `static` `void` `main(String args[]) ``    ``{ ``        ``int` `b = ``4``; ``        ``int` `k = ``5``; `` ` `        ``int` `ans = findPow(b, k); `` ` `        ``System.out.println(b + ``" to the "` `+ k ``                           ``+ ``"th power is: "``                           ``+ ans); `` ` `        ``b = ``12``; ``        ``k = ``3``; `` ` `        ``ans = findPow(b, k); `` ` `        ``System.out.println(b + ``" to the "` `+ k ``                           ``+ ``"th power is: "``                           ``+ ans); ``    ``} ``} `

Output:
```4 to the 5th power is: 1024
12 to the 3th power is: 1728
```
Example 2 :
 `// Java code to show implementation of ``// pow(int b, int k) method of Guava's ``// IntMath class ``import` `java.math.RoundingMode; ``import` `com.google.common.math.IntMath; `` ` `class` `GFG { `` ` `    ``static` `int` `findPow(``int` `b, ``int` `k) ``    ``{ `` ` `        ``try` `{ ``            ``// Using pow(int b, int k) ``            ``// method of Guava's IntMath class ``            ``// This should throw "IllegalArgumentException" ``            ``// as k < 0 ``            ``int` `ans = IntMath.pow(b, k); `` ` `            ``// Return the answer ``            ``return` `ans; ``        ``} ``        ``catch` `(Exception e) { ``            ``System.out.println(e); ``            ``return` `-``1``; ``        ``} ``    ``} `` ` `    ``// Driver code ``    ``public` `static` `void` `main(String args[]) ``    ``{ ``        ``int` `b = ``4``; ``        ``int` `k = -``5``; `` ` `        ``try` `{ ``            ``// Using pow(int b, int k) ``            ``// method of Guava's IntMath class ``            ``// This should throw "IllegalArgumentException" ``            ``// as k < 0 ``            ``IntMath.pow(b, k); ``        ``} ``        ``catch` `(Exception e) { ``            ``System.out.println(e); ``        ``} ``    ``} ``} `

Output:
```java.lang.IllegalArgumentException: exponent (-5) must be >= 0
```