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## Example:Program of Perfect Number and Reverse of a Number in C language

By on 01:19

Program of Perfect Number:

Suppose we enter 6 then

Perfect no. like   "  6->1+2+3+6=12(factors)  then

2*6=12 when we double"

Q)Write a program to enter a value and check the number is perfect or not.

Note:-You can also create this program in java,c# etc. with the same logic.

P:#include<stdio.h>
void main()
{
int i,n,s;
printf("enter no.");
scanf("%d",&n);
s=0;
for(i=1;i<=n;i++)
{
if(n%i==0)
s=s+i;
}
if(s==2*n)
printf("perfect no.");
else
printf("No. is not perfect");
getch();
}

Program of Reverse Number:

Reverse of no. like 134=431(Reverse)

Q)Write a program to enter a value and print the reverse of digit.

P:#include<stdio.h>
void main()
{
int r,n,d;
printf("enter no.");
scanf("%d",&n);
r=1;
while(n!=0)
{
d=n%10;
r=r*10+d;
n=n/10;
}
printf("reverse value=%d",r);
getch();
}

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