Why does the bottom half loop start at N - 1?
The top half prints the widest row. If the bottom half started at N, it would duplicate the widest row, making the center of the diamond too thick.
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More FAQs in Printing a Diamond Star Pattern
A composite pattern is a complex visual shape that is built by combining two or more simpler patterns, like triangles or pyramids, back-to-back.
Mentally split it in half horizontally. The top half is a standard centered pyramid. The bottom half is an inverted centered pyramid.
Yes, by iterating from 1 to 2N-1 and using absolute values or complex math to calculate spaces, but splitting it into two loops is much cleaner and easier to read.
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