- Given a integer number, find out the power of given number.
Methods to calculate power of given number.
- Calculate power of number using while loop method.
- Find out power using JDK Math class
| Method Name | Description |
|---|
| double pow(double a, double b) | Returns the value of the first argument raised to the power of the second argument. |
Examples to find power of integer number in java
Example 1 : calculate power of input number : 4²
Enter base number : 4
Enter power number : 2
Power of number = 4² = 16
Example 2 :
Enter base number : 10
Enter power number : 3
Power of number = 10³ = 1000
Program: calculate power of integer using loop & JDK method
package org.learn;
import java.util.Scanner;
public class PowerOfNumber {
private static int powerUsingLoop(int baseNumber, int power) {
int outputNumber = 1;
int index = 0;
while (index < power) {
outputNumber = baseNumber * outputNumber;
index++;
}
return outputNumber;
}
private static int powerMathClass(int baseNumber, int power) {
return (int) Math.pow(baseNumber, power);
}
public static void main(String[] args) {
try (Scanner scanner = new Scanner(System.in)) {
System.out.print("Enter base number : ");
int baseNumber = scanner.nextInt();
System.out.print("Enter power number : ");
int power = scanner.nextInt();
int powerResult = powerUsingLoop(baseNumber,power);
System.out.println("Power of number using Loop :"
+powerResult);
powerResult = powerMathClass(baseNumber,power);
System.out.println("Power of number using Math class :"
+powerResult);
}
}
}
Output: calculate power of integer using loop & JDK method
Enter base number : 4
Enter power number : 2
Power of number using Loop :16
Power of number using Math class :16
************************************************
Enter base number : 10
Enter power number : 3
Power of number using Loop :1000
Power of number using Math class :1000
