Question

JAVA

Restrictions

1. don't use any other way to implement a loop but recursion (while and for are forbidden).

2. don't use Math.pow\

3. Pls do not use while or for


1. write a class called MultiplyByItself with a main method

  2. the program asks for two integer numbers: x and n.  n must be 0
  or greater than 0.

  3. then the program prints x raised to the n-th power.  For example
  if x is 2 and n is 3 the program prints the result of multiplying
  2*2*2 = 8. (see examples)

Examples:

java MultiplyByItself

enter an integer: 2

enter another integer: 0

1

java MultiplyByItself

enter an integer: 2

enter another integer: 1

2

java MultiplyByItself

enter an integer: 2

enter another integer: 3

8

java MultiplyByItself

enter an integer: 2

enter another integer: 10

1024

java MultiplyByItself

enter an integer: 3

enter another integer: 2

9

java MultiplyByItself

enter an integer: 3

enter another integer: 3

27

Answer 1

Java Program:

import java.util.*;

class Main {

public static int multiplyByItself(int x,int n){

if(n==0)

return 1;

else

return x*(multiplyByItself(x,n-1));

}

public static void main(String[] args) {

int x,n;

Scanner sc=new Scanner(System.in);

System.out.print("enter an integer:");

x=sc.nextInt();

System.out.print("enter another integer:");

n=sc.nextInt();

System.out.println(multiplyByItself(x,n));

}

}

java version "1.8.0_31" Java (TM) SE Runtime Environment (build 1.8.0 31-b13) Java HotSpot (TM) 64-Bit Server VM (build 25.31-b07, mixed mode) enter an integer:2 enter another integer:0 1 E].

java version "1.8.0_31" Java (TM) SE Runtime Environment (build 1.8.0 31-b13) Java HotSpot (TM) 64-Bit Server VM (build 25.31-b07, mixed mode) enter an integer:2 enter another integer:3

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