C program to check whether the entered number is divisible by 5 but not by 11

Introduction:

In computer programming, it is often necessary to check whether a given number is divisible by certain other numbers. In this article, we will focus on a specific case where we want to check whether the entered number is divisible by 5 but not by 11. We will provide a C program that can perform this check.

Before we dive into the code, let's briefly discuss the concept of divisibility. A number is said to be divisible by another number if it can be divided by that number without leaving a remainder. For example, 15 is divisible by 5 because 15/5 = 3 with no remainder. On the other hand, 15 is not divisible by 11 because 15/11 = 1 with a remainder of 4.

To check whether a number is divisible by 5 but not by 11, we can use the module operator (%). The module operator returns the remainder when one number is divided by another. If the remainder is 0, it means that the first number is divisible by the second number.

Now, let's take a look at the C program that can perform this check:

#include <stdio.h>
int main()
{
int num;
printf("Enter a number: ");
scanf("%d", &num);
if (num % 5 == 0 && num % 11 != 0)
{
printf("%d is divisible by 5 but not by 11.\n", num);
}
else
{
printf("%d is not divisible by 5 but not by 11.\n", num);
}
return 0;
}

Explanation of the program:

The program first prompts the user to enter a number using the printf() and scanf() functions. The input is stored in the variable num. We then use an if statement to check whether num is divisible by 5 but not by 11. If the condition is true, the program prints a message saying that the number is divisible by 5 but not by 11. If the condition is false, the program prints a message saying that the number is not divisible by 5 but not by 11.

Output:

FAQs

Q: What happens if I enter a non-integer value? 

Ans: The program will not work as intended and may produce unexpected results. It is important to ensure that the user input is of the correct data type.

Q: Can I modify the program to check for other divisors? 

Ans: Yes, you can modify the program to check for other divisors by changing the values used in the conditional statement. For example, to check whether a number is divisible by 3 but not by 7, you can change the condition to "if(num%3==0 && num%7!=0)".

Q: How can I test the program to see if it works correctly? 

Ans: You can test the program by entering various integer values and verifying whether the output is correct. You can also use a debugger to step through the code and see how the program executes.

Q: Is this program useful in real-world applications? 

Ans: Yes, this program can be useful in various applications that require verifying whether a number is divisible by a certain value or not. For example, in payment processing systems, this program can be used to validate input values before processing payments.

Conclusion: 

In this article, we have discussed how to write a C program to check whether the entered number is divisible by 5 but not by 11. We have covered the basic syntax, code implementation, and frequently asked questions about this program. It is important to note that this program can be modified to check for other divisors as well, depending on the specific requirements of the application. By understanding the basic concepts of programming and using the correct syntax, you can create efficient and reliable programs to solve various real-world problems.