Sum of N Numbers in C++ Programming
The program is written in C++ programming language and it calculates the sum of the first "n" natural numbers using a for loop. Here's a step-by-step explanation of the program:
- #include<iostream> - This is a preprocessor directive that includes the iostream header file in the program. This file provides input and output operations in C++.
- using namespace std; - This statement tells the compiler to use the standard namespace, which contains the standard C++ library.
- int main() - This is the starting point of the program. The main() function is the entry point for all C++ programs.
- int n, i, total = 0; - This statement declares three integer variables "n", "i", and "total". "n" is used to store the limit up to which the sum needs to be calculated, "i" is used as a loop variable, and "total" is used to store the sum of the natural numbers.
- cout<<"\nEnter The Limit : "; - This statement prints a message to the console, asking the user to enter the limit up to which the sum needs to be calculated.
- cin>>n; - This statement reads the user input from the console and stores it in the variable "n".
- for(i=1;i<=n;i++) - This is a for loop that iterates from 1 to the value of "n". The loop variable "i" is initialized to 1 and incremented by 1 in each iteration until it reaches the value of "n".
- total=total+i; - This statement adds the value of "i" to the variable "total" in each iteration of the loop.
- cout<<"\nSum of N Number is : "<<total; - This statement prints the sum of the first "n" natural numbers to the console.
- return 0; - This statement ends the program and returns the value 0 to the operating system. The value 0 indicates that the program executed successfully.
Source Code
//Program to find the sum of n numbers 3=> 1+2+3=>6
#include<iostream>
using namespace std;
int main()
{
int n,i,total=0;
cout<<"\nEnter The Limit : ";
cin>>n;//3
for(i=1;i<=n;i++)//1 2 3
{
total=total+i;//1 3 6
}
cout<<"\nSum of N Number is : "<<total;
return 0;
}
Output
Enter The Limit : 10
Sum of N Number is : 55
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