C++ program to find sum of series 1 + 2 + 3 +……+ n

Program

#include<iostream.h>
#include<conio.h>

void main()
{
clrscr();
int i,n,sum=0;
cout<<“1+2+3+……+n”;
cout<<“nEnter the value of n:”;
cin>>n;

for(i=1;i<=n;++i)
sum+=i;
cout<<“nSum=”<<sum;
getch();
}

Output