Strong number in C

A number can be said as a strong number when the sum of the factorial of the individual digits is equal to the number.

For example, 145 is a strong number.

Let's understand through an example.

Program to check whether the number is strong or not.

#include <stdio.h>
int main()
{
    int n;
    int sum=0;
    printf("Enter a number");
    scanf("%d",&n);
    int k=n;
    int r;
    while(k!=0)
    {
        r=k%10;
        int f=fact(r);
        k=k/10;
        sum=sum+f;
    }
    if(sum==n)
    {
        printf("\nNumber is a strong");
    }
    else
    {
        printf("\nNumber is not a strong");
    }
    return 0;
}
int fact(int r)
{
    int mul=1;
    for(int i=1;i<=r;i++)
    {
        mul=mul*i;
    }
    return mul;
    
}

In the above code, the input data is retrieved from the user, and then the data is checked whether the input data is a strong number or not.

Output

Program to print the strong numbers from 1 to n.

#include<stdio.h>
int main()
{
    int fact=1,sum=0;
    int n,r;
    printf("Enter the 'n' number");
    scanf("%d",&n);
    printf("\n Strong numbers are :");
    for(int i=1;i<=n;i++)
    {
        int k=i;
        while(k!=0)
        {
            r=k%10;
            fact=factorial(r);
           
        
            k=k/10;
            sum=sum+fact;
        }
        if(sum==i){
        printf("%d, ",i);
        
           }
           sum=0;
    }
    
   
    return 0;
}

 int factorial(int f)
    {
        int mul=1;
        for(int i=1; i<=f;i++)
        {
            mul=mul*i;
        }
        return mul;
    }

Output

Program to find strong numbers in a given range.

#include<stdio.h>
int main()
{
    int fact=1,sum=0;
    int n1,n2,r;
    printf("Enter the first number");
    scanf("%d",&n1);
    printf("\nEnter the last number");
    scanf("%d",&n2);
    printf("\nStrong numbers are :");
    for(int i=n1;i<=n2;i++)
    {
        int k=i;
        while(k!=0)
        {
            r=k%10;
            fact=factorial(r);
            k=k/10;
            sum=sum+fact;
        }
        if(sum==i){
        printf("%d, ",i);
        }
           sum=0;
    }
   return 0;
}
int factorial(int f)
 {
        int mul=1;
        for(int i=1; i<=f;i++)
        {
            mul=mul*i;
        }
        return mul;
    }

Output:

Next TopicStar Patterns Program in C

← prev next →

For Videos Join Our Youtube Channel: Join Now

Feedback

Send your Feedback to [email protected]

Help Others, Please Share

Learn Latest Tutorials

Splunk

SPSS

Swagger

Transact-SQL

Tumblr

ReactJS

Regex

Reinforcement Learning

R Programming

RxJS

React Native

Python Design Patterns

Python Pillow

Python Turtle

Keras

Preparation

Aptitude

Reasoning

Verbal Ability

Interview Questions

Company Questions

Trending Technologies

Artificial Intelligence

AWS

Selenium

Cloud Computing

Hadoop

ReactJS

Data Science

Angular 7

Blockchain

Git

Machine Learning

DevOps

B.Tech / MCA

DBMS

Data Structures

DAA

Operating System

Computer Network

Compiler Design

Computer Organization

Discrete Mathematics

Ethical Hacking

Computer Graphics

Software Engineering

Web Technology

Cyber Security

Automata

C Programming

C++

Java

.Net

Python

Programs

Control System

Data Mining

Data Warehouse

Javatpoint Services

JavaTpoint offers too many high quality services. Mail us on h[email protected], to get more information about given services.

Website Designing
Website Development
Java Development
PHP Development
WordPress
Graphic Designing
Logo
Digital Marketing
On Page and Off Page SEO
PPC
Content Development
Corporate Training
Classroom and Online Training
Data Entry

Training For College Campus

JavaTpoint offers college campus training on Core Java, Advance Java, .Net, Android, Hadoop, PHP, Web Technology and Python. Please mail your requirement at [email protected].
Duration: 1 week to 2 week

^{Like/Subscribe us for latest updates or newsletter}