12.Write a program in c to check if a given number is a strong number or not using a while loop.
Strong Numbers
A strong number is a number that is the sum of the factorial of its individual numbers (digits).
Examples
Let's say the number is 145, which equals 1! +4! +5! = 1 + 24 + 120 = 145.
145 is a strong number because the sum of its multiples equals the number itself.
Let's say the number is 112, which equals 1! +1 +2 = 1 + 1 + 2 = 4
Here 4 does not equal 112.
Therefore, 112 is not a strong number.
Description
Write a C program that prompts the user for a number and then checks whether the number is a strong number. Additionally, create a program that examines for strong numbers within a certain range.
Problem Solution
1.Take a number as input and store it in a variable called number.
2.Extract the digits of a number and find the factorial of each digit number.
3.Calculate the sum of the factorial of each digit number.
4.If the sum equals a number, print Number is a strong number.
5.If the sum does not equal the number, print The number is not a strong number.
Check whether a given Number is strong Number using while loop in C
/*
* Check whether a given Number is strong Number using while loop in C
*/
#include<stdio.h>
int factorial(int n)
{
int i, fact = 1;
for (i = 1; i <= n; i++)
{
fact=fact*i;
}
return fact;
}
int main(void)
{
int number, sum = 0;
printf("Enter the number: ");
scanf("%d",&number);
int i=n;
while (i!=0)
{
sum = sum + factorial(i%10);
i = i / 10;
}
if (sum == n)
{
printf("\nThe number %d is strong number",number);
}
else
{
printf("\nThe number %d is not a strong number", number);
}
return(0);
}
