How write a recursive print program

Question

Gurus,

I want to know how to write a recursive function that prints

1
12
123
1234
...
......

For eg: display(4) should print

Answer 1

This question is quite old, yet none of the answers answer the actual question, viz. solving the problem in C using recursion only, without explicit loops.

Here is a simple solution obtained by fixing the misunderstanding present in the original code (confusion between two possible functions of "print"). There are no explicit loops.

#include 

void countto(int n)
{
        if(n != 0)
        {
        countto(n-1);
        printf("%d",n);
        }
}

void triang(int n)
{
        if(n != 0)
        {
                triang(n-1);
                printf("\n");
                countto(n);
        }
}

int main()
{
        triang(4);
}