# 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