The answer
For patterns, starting at 1 often makes the mathematical formulas much easier to read and derive, though starting at 0 is technically standard for array access.
Understanding Row and Column Relationships in Patterns
Is it better to start the row counter at 0 or 1?
More FAQs in Understanding Row and Column Relationships in Patterns
It always consists of an outer loop tracking the rows, one or more inner loops tracking columns/spaces, and a newline command at the end of the outer loop.
Create a table on paper. Write down the row number on the left, and the number of stars on the right. Look for a linear equation (y = mx + b) that connects them.
You are likely using a print-line command (like println) inside the inner loop, forcing every single star onto a new line instead of keeping them on the same row.
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