Java Program to Calculate the Power of a Number

Java Program to Calculate the Power of a Number

In this example, we will learn to calculate the power of a number with and without using pow() function.

Example 1:

public class Power {

public static void main(String[] args) {

int base = 4, exponent = 7;

long result = 1;

while (exponent != 0)
{
result *= base;
--exponent;
}

System.out.println("Answer = " + result);
}
}

Output :

Answer = 16384

In this program, base and exponent are assigned values 4 and 7 respectively.

Using the while loop, we keep on multiplying result by base until exponent becomes zero.

Example 2:

public class Power {

public static void main(String[] args) {

int base = 4, exponent = 7;

long result = 1;

for (;exponent != 0; --exponent)
{
result *= base;
}

System.out.println("Answer = " + result);
}
}

Output :

Answer = 16384

Example 3:

public class Power {

public static void main(String[] args) {

int base = 8, exponent = 2;
double result = Math.pow(base, exponent);

System.out.println("Answer = " + result);
}
}

Output :

Answer = 64.0

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