How do you combine multiple boundaries?
You use the logical OR (||) operator in your if-statement. If any one of the geometric boundary conditions is met, a star is printed.
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More FAQs in Complex Boundary Conditions in Pattern Printing
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).
Assuming 1-based indexing, the anti-diagonal occurs where the sum of the row and column coordinates equals N + 1.
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.
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