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Program #4: To Print 1 23 456 78910 1112131415

C++ Language

#include<iostream.h>
#include<conio.h>
void main()
{
    int i,j,n,a=1;
    clrscr();
    cout<<"Enter a Number - "<<endl;
    cin>>n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=i;j++)
        {
            cout<<a;
            a++;
        }
    cout<<endl;
    }
    getch();
}

/*OUTPUT*/
Enter a Number - 
8
1
23
456
78910
1112131415
161718192021
22232425262728
2930313233343536