The for loop

/* Program : The for loop */
    #include <iostream.h>
    void main()
    {
        int i = 0 ;
        cout<<"Table of 15 -\n";

        for (i=1 ; i<=10 ; ++i)
            cout<<"15 * "<<i<<" : "<<15*i;
    }
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/* Program : The for loop */
    #include <iostream.h>
    void main()
    {
        int i , sum = 0 ;
        for (i=1 ; i<21 ; i++)
            sum = sum + i ;
        cout<<"The sum of first twenty numbers is "<<sum;
    }

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/* Program: The for loop */
    #include <iostream.h>
    void main()
    {
        int i = 0 ;
        cout<<"Table of 15 -\n";
        for (i=1 ; i<=10 ; i++)
            cout<<"15 * "<<i<<" : "<<15*i;
    }