Find out all Perfect numbers present within a given range

Write a C program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range in C.

Program in C

Code:

/*Write a C program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range Using C*/

#include<stdio.h>

int main()

{

    int j,i,range1,range2;

    printf("Enter a range:");

    scanf("%d %d",&range1,&range2);

    printf("Perfect numbers between %d and %d are:",range1,range2);

    for(j=range1;j<=range2;j++)

    {

    int num=j;

    int sum=0;

    for(i=1;i<j;i++)

    {

        if(j%i==0)

        {

            sum=sum+i;

        }

    }

   if(sum==num)

     printf("%d ",j);

}

}

Input/Output:

Enter a range:

2

200

Perfect numbers between 2 and 200 are:6 28

Write a C++ program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range in C++.

Program in C++

Code:

/*Write a C++ program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range using C++*/

#include<iostream>

using namespace std;

int main()

{

    int range1,range2;

    cout<<"Enter a range:";

    cin>>range1>>range2;

    cout<<"Perfect numbers between "<<range1<<" and "<<range2<<" are:";

    for(int j=range1;j<=range2;j++)

    {

    int num=j;

    int sum=0;

    for(int i=1;i<j;i++)

    {

        if(j%i==0)

        {

            sum=sum+i;

        }

    }

   if(sum==num)

     cout<<j<<" ";

}

}

Input/Output:

Enter a range:

201

500

Perfect numbers between 201 and 500 are:496

Write a JAVA program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range in Java.

Program in Java

Code:

/*Write a JAVA program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range using Java*/

import java.util.Scanner;

public class PerfectNumberInRange {

public static void main(String[] args) {

Scanner cs=new Scanner(System.in);

int firstnumber, endnumber, i;

       System.out.println("Enter the First number:");

       firstnumber=cs.nextInt();

       System.out.println("Enter the Last number:");

       endnumber=cs.nextInt();

System.out.println("Perfect numbers between "+firstnumber+" and "+endnumber+" are:");

  for(i=firstnumber;i<=endnumber;i++)

    {

  int num=i;

    int sum=0;

    for(int j=1;j<i;j++)

    {

        if(i%j==0)

        {

            sum=sum+j;

        }

    }

   if(sum==num)

     System.out.print(i+" ");

    }

cs.close();

}}

Input/Output:

Enter the First number:

501

Enter the Last number:

1000000

Perfect numbers between 501 and 1000000 are:

8128 

Write a PYTHON to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range in Python.

Program in Python

Code:

'''Write a Python program to find out all Perfect numbers present within a given range. or Write a program to find out all Perfect numbers present within a given range using Python '''

print("Enter a range:")
range1=int(input())
range2=int(input())
print("Perfect numbers between ",range1," and ",range2," are: ")
for j in range(range1,range2+1):
    sum=0
    num=j
    for i in range(1,j):
        if(j%i==0):
            sum=sum+i
    if sum==num:
      print(j,end=" ") 

Input/Output:

Enter a range:

20

10000

Perfect numbers between  20  and  10000  are: 

28 496 8128