Printing sum of numbers using For Loop in C++
This is a C++ program that calculates the sum of numbers from 1 to a given limit entered by the user. Here's a step-by-step breakdown of the program:
- The program includes the <iostream> library, which allows it to input and output data through the console.
- The program begins with the main() function, which is the starting point for any C++ program.
- Inside the main() function, there are three integer variables declared: i, sum, and n.
- The program prompts the user to enter a limit by displaying the message "Enter the Limit:" on the console.
- The user enters the limit, which is stored in the variable n using the cin (console input) statement.
- The program then enters a for loop that iterates from 1 to n, with i starting at 1 and increasing by 1 on each iteration.
- Inside the loop, the sum variable is updated by adding the current value of i to it.
- Once the loop completes, the total sum of numbers from 1 to n is stored in the variable sum.
- Finally, the program prints the value of sum on the console using the cout (console output) statement.
- The program returns 0, which indicates that the program has executed successfully.
Source Code
#include<iostream>
using namespace std;
int main()
{
int i,sum=0,n;
cout<<"\nEnter the Limit:";
cin>>n;
for(i=1;i<=n;i++)
{
sum=sum+i;
}
cout<<sum;
return 0;
}
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Output
Enter the Limit:5
15