C++ Program to Calculate Sum of Natural Numbers

In this example, you'll learn to calculate the sum of natural numbers.
To understand this example, you should have the knowledge of following C++ programming topics:
  • C++ for Loop
Positive integers 1, 2, 3, 4... are known as natural numbers.
This program takes a positive integer from user( suppose user entered n ) then, this program displays the value of 1+2+3+....+n. Read More C++

Example: Sum of Natural Numbers using loop

#include <iostream>
using namespace std;

int main()
{
    int n, sum = 0;

    cout << "Enter a positive integer: ";
    cin >> n;

    for (int i = 1; i <= n; ++i) {
        sum += i;
    }

    cout << "Sum = " << sum;
    return 0;
}
Output
Enter a positive integer: 50
Sum = 1275
This program assumes that user always enters positive number.
If user enters negative number, Sum = 0 is displayed and program is terminated.
This program can also be done using recursion.

Comments

Post a Comment

Popular posts from this blog

C++ Program to Find Quotient and Remainder

In this example, you will learn to find the quotient and remainder of a given dividend and divisor. In this program, user is asked to enter two integers (divisor and dividend) and computes the quotient and remainder. Read More  C++ To compute quotient and remainder, both divisor and dividend should be integers. Example: Compute quotient and remainder #include <iostream> using namespace std ; int main () { int divisor , dividend , quotient , remainder ; cout << "Enter dividend: " ; cin >> dividend ; cout << "Enter divisor: " ; cin >> divisor ; quotient = dividend / divisor ; remainder = dividend % divisor ; cout << "Quotient = " << quotient << endl ; cout << "Remainder = " << remainder ; return 0 ; } Output Enter dividend: 13 Enter divisor: 4 Quotient = 3 Remainde...
Read more

C++ Program to Find Factorial

Image
The factorial of a positive integer n is equal to 1*2*3*...n. You will learn to calculate the factorial of a number using for loop in this example. Find Factorial To understand this example, you should have the knowledge of following C++ programming topics: C++ Program to Check Leap Year For any positive number  n , it's factorial is given by: factorial = 1*2*3...*n Factorial of negative number cannot be found and factorial of 0 is 1. In this program below, user is asked to enter a positive integer. Then the factorial of that number is computed and displayed in the screen. Example: Find Factorial of a given number #include <iostream> using namespace std ; int main () { unsigned int n ; unsigned long long factorial = 1 ; cout << "Enter a positive integer: " ; cin >> n ; for ( int i = 1 ; i <= n ; ++ i ) { factorial *= i ; } cout << ...
Read more

C++ Program to Generate Multiplication Table

Example to generate the multiplication table of a number (entered by the user) using for loop. To understand this example, you should have the knowledge of following C++ programming topics: C++ Program to Find Factorial Example 1: Display Multiplication table up to 10 #include <iostream> using namespace std ; int main () { int n ; cout << "Enter a positive integer: " ; cin >> n ; for ( int i = 1 ; i <= 10 ; ++ i ) { cout << n << " * " << i << " = " << n * i << endl ; } return 0 ; } Output Enter an integer: 5 5 * 1 = 5 5 * 2 = 10 5 * 3 = 15 5 * 4 = 20 5 * 5 = 25 5 * 6 = 30 5 * 7 = 35 5 * 8 = 40 5 * 9 = 45 5 * 10 = 50 This program above computes the multiplication table up to 10 only. The program below is the modification of above program in which the user is also asked to entered the range u...
Read more