C++ Exercises: Check if a given number is within 2 of a multiple of 10

Last update on April 07 2025 12:56:48 (UTC/GMT +8 hours)

Within 2 of Multiple of 10

Write a C++ program to check if a given number is within 2 of a multiple of 10.

Sample Solution:

C++ Code :

#include <iostream>
using namespace std;

// Function to check if a number's last digit is less than or equal to 2 OR greater than or equal to 8
bool test(int n)
{
    // Returns true if the last digit of n is less than or equal to 2 OR greater than or equal to 8
    return n % 10 <= 2 || n % 10 >= 8;
}

int main() 
{
    // Testing the test function with different input values
    cout << test(3) << endl;
    cout << test(7) << endl;
    cout << test(8) << endl;
    cout << test(21) << endl;

    return 0; // Return 0 to indicate successful completion
}

Sample Output:

0
0
1
1

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C++ program to check if a given number is within 2 units of any multiple of 10 by calculating its distance from the nearest multiple.
• Write a C++ program that reads an integer and outputs true if the absolute difference between it and the nearest multiple of 10 is less than or equal to 2.
• Write a C++ program to determine whether a number is almost a multiple of 10 (within 2), using modulo operations to measure closeness.
• Write a C++ program that computes the remainder of a number divided by 10 and returns true if this remainder is 0, 1, 2, 8, or 9.

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