C Exercises: Check whether a given number is an ugly number

C Numbers: Exercise-1 with Solution

Write a program in C to check whether a given number is an ugly number or not.

Test Data
Input an integer number: 25

Sample Solution:

C Code:

# include <stdio.h>
# include <string.h>

int main()
{
int n,x=0;
  printf("\n\n Check whether a given number is an ugly number:\n");
  printf("----------------------------------------------------\n");
  printf("Input an integer number: ");
  scanf("%d",&n);

      if (n <= 0) {  
            printf("Input a correct number.");  
        }
       while (n != 1) 
       {  
            if (n % 5 == 0) 
            {  
                n /= 5;  
            } 
            else if (n % 3 == 0) 
            {  
                n /= 3;  
            } 
            else if (n % 2 == 0) 
            {  
                n /= 2;  
            } 
            else 
            {  
                printf("It is not an ugly number.\n"); 
                x = 1;  
                break;  
            }  
        } 
		        if (x==0)
		        { 
                printf("It is an ugly number.\n");
                }
}

Sample Output:

Input an integer number: 25                                                                              
It is an ugly number. 

Pictorial Presentation:

Flowchart:

C Programming Code Editor:

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