Q: Why do we still use a dynamic inner loop (col <= row) for a hollow triangle?

Because we only want to evaluate the coordinate space that actually exists inside the triangle boundary. Evaluating the full N x N grid would require unnecessary blank space calculations.

Question 1

How do you combine multiple boundaries?

Accepted Answer

You use the logical OR (||) operator in your if-statement. If any one of the geometric boundary conditions is met, a star is printed.

Question 2

How do you identify the boundaries of a hollow triangle?

Accepted Answer

The boundaries are the first column (col == 1), the last row (row == N), and the diagonal edge where the column index equals the row index (col == row).

Question 3

What is the formula for the anti-diagonal in a square?

Accepted Answer

Assuming 1-based indexing, the anti-diagonal occurs where the sum of the row and column coordinates equals N + 1.

Question 4

Why do we still use a dynamic inner loop (col <= row) for a hollow triangle?

Accepted Answer

Because we only want to evaluate the coordinate space that actually exists inside the triangle boundary. Evaluating the full N x N grid would require unnecessary blank space calculations.

How do you combine multiple boundaries?

More FAQs in Complex Boundary Conditions in Pattern Printing

Still have questions?

Want to upskill yourself?

Small steps. Big possibilities.

Our courses are taking a Coffee break, but your curiosity shouldn't. Stay engaged with namastedev linkedin, youtube, discord and other resources while you wait.