Write a C program to check whether a number is strong number or not

In this article, we will write a C program to check whether a number is a Strong number or not.

Algorithm: Strong number 

Step 1:read num,i,f,r,sum=0,temp 

Step 2: assign num to temp 

Step 3: while(num) goto step 4 

Step 4: 

            i=1,

            f=1 r=num%10 

            while(i<=r) goto step 5 

Step 5: f=f*i i=i+1 

Step 6: sum=sum+f; 

Step 7: num=num/10; 

Step 8: if sum and temp are equal got step 9 

Step 9: print strong number otherwise not a strong number

Write a C program to check whether a number is strong number or not

#include <stdio.h>

int main()
{
	int num, i, f, r, sum = 0, temp;
	printf("Enter a number: ");
	scanf("%d", &num);
	temp = num;
	while (num)
	{
		i = 1, f = 1;
		r = num % 10;
		while (i <= r)
		{
			f = f * i;
			i++;
		}
		sum = sum + f;
		num = num / 10;
	}
	if (sum == temp)
		printf("%d is a strong number", temp);
	else
		printf("%d is not a strong number", temp);
	return 0;
}

Input:

Enter a number:145

Output:

145 is a strong number

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