C++ program to check if a number is divisible by 5 and 11

C++ program to check if a number is divisible by 5 and 11:

In this post, we will learn how to check if a number is divisible by 5 and 11 or not. This program will take one number as input from the user and it will print the result, i.e. if it is divisible by both 5 and 11 or not.

With this program, you will learn how to take user inputs in C++, how to print result on console, how to use modulo operator and how to use if-else blocks in C++.

Algorithm:

We will follow the below algorithm:

Take the number as input from the user.
Check if it is divisible by 5 and 11 or not.
Print one message to the user.

Modulo operator:

The modulo operator is used to get the remainder of a division. % is used for modulo operator. For example, if x and y are two numbers, x%y will give the remainder of x/y, i.e. the remainder we will get if x is divided by y.

For example, 10%2 is 0 and 11%2 is 1.

Method 1: C++ program to check if a number is divisible by 5 and 11 by using a if-else block:

Below is the complete program:

#include <iostream>

using namespace std;

int main()
{
    int no;

    cout << "Enter a number: " << endl;
    cin >> no;

    if (no % 5 == 0 && no % 11 == 0)
    {
        cout << "It is divisible by 5 and 11" << endl;
    }
    else
    {
        cout << "It is not divisible by 5 and 11" << endl;
    }
}

Here,

no is an integer variable to hold the user input number.
Using cout and cin, we are reading the number as input from the user.
The if block checks if this number is divisible by 5 and 11 or not.
If yes, it runs the body of the if block. Else, it runs the body of the else block.

If you run this program, it will print output as like below:

Enter a number: 
55
It is divisible by 5 and 11

Enter a number: 
11
It is not divisible by 5 and 11

Method 2: C++ program to check if a number is divisible by 5 and 11 by using a ternary or conditional operator:

We can also use conditional or ternary operator to write this program. The conditional or ternary operator is similar to if-else block, but we can use it to write the same check in just one line.

It is defined as like below:

exp ? code1 : code2

It will execute code1 if exp is true. Else, it will execute code2.

Let’s write down the complete program:

#include <iostream>

using namespace std;

int main()
{
    int no;

    cout << "Enter a number: " << endl;
    cin >> no;

    (no % 5 == 0 && no % 11 == 0) ? cout << "It is divisible by 5 and 11" << endl : cout << "It is not divisible by 5 and 11" << endl;
}

The expression is (no % 5 == 0 && no % 11 == 0) and it is checking if the number is divisible by 5 and 11 or not. It is printing one message based on its result.

If you run this program, it will print similar output.

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Updated on 22 Sep 2021

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