Loops (For Loop)

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

void main()
{
    int i;
    clrscr();

    for(i = 1; i < = 10; i++)
        cout<<"\n"<<i;
}

Sum of first 10 numbers:

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

void main()
{
    int i, sum = 0;
    clrscr();

    for(i = 1; i < = 10; i++)
        sum = sum + i;

    cout<<"Sum is :"<<sum;
}


Enter 10 numbers and Print its sum:

#include<iostream.h>

#include<conio.h>

void main()
{
    int i, sum = 0, no;
    clrscr();

    for(i = 1; i < = 10; i++)
    {
        cout<<"Enter number :";
        cin>>no;

        sum = sum + no;
    }

    cout<<"Sum of 10 numbers is :"<<sum;
}