In this post, we will learn how to find the last digit of a number using C++ Programming language.
We will calculate the last digit of a number using (%) Modulus operator.
We will be using the following approaches to find the last digit of a number.
- Using Standard Method
- Using Function
So, without further ado, let’s begin this tutorial.
C++ Program to Find Last Digit of a Number
// C++ Program to Find Last Digit of a Number
#include <iostream>
using namespace std;
int main(){
int num, digit;
// Asking for input
cout << "Enter a number: ";
cin >> num;
// Finding last digit
digit = num % 10;
// Displaying output
cout << "Last digit of " << num << " is: " << digit << endl;
return 0;
}
Output
Enter a number: 527
Last digit of 527 is: 7
How Does This Program Work ?
int num, digit;
In this program, we have declared two integer data type variables named num and digit.
// Asking for input
cout << "Enter a number: ";
cin >> num;
Now, the user is asked to enter a number.
// Finding last digit
digit = num % 10;
We compute the last digit of the entered number using (%) Modulus operator. Modulus (%) returns the remainder, which is usually the last digit of any number.
For example, if the user enters a number 815, then 815 % 10 = 5 which is the last digit. Similarly, if the user enters 640, then 640 % 10 = 0, which is the last digit of the number.
// Displaying output
cout << "Last digit of " << num << " is: " << digit << endl;
Then, we print the result on the screen using the cout statement.
C++ Program to Find Last Digit of a Number Using Function
// C++ Program to Find Last Digit of a Number Using Function
#include <iostream>
using namespace std;
int lastDigit(int n){
return (n % 10);
}
int main(){
int num, digit;
// Asking for input
cout << "Enter a number: ";
cin >> num;
// Calling out function
digit = lastDigit(num);
// Displaying output
cout << "Last Digit of " << num << " is: " << digit << endl;
return 0;
}
Output
Enter a number: 1024
Last Digit of 1024 is: 4
Conclusion
I hope after going through this post, you understand how to find the last digit of a number using C++ Programming language.
If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to assist you.
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