Power program;

class Power{
public static void main(String args[]){
int base=2;
int ex=4;
int result=1;
while(ex>0){
result=result*base;
ex–;
}
System.out.println(result);
}
}

output;

sobhika@sobhika-HP-Laptop-15-db1xxx:~$ javac Factorial.java
sobhika@sobhika-HP-Laptop-15-db1xxx:~$ java Factorial
3628800

Factorial program:

class Factorial{
public static void main(String args[]){
int n=10;
int h=1;
int result=1;
while(h<=10){
result=result*h;
h=h+1;
}
System.out.println(result);
}
}

output:

sobhika@sobhika-HP-Laptop-15-db1xxx:~$ javac Power.java
sobhika@sobhika-HP-Laptop-15-db1xxx:~$ java Power
16