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Pascal's triangle: Difference between revisions
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For example, the next row would be 1 (since the first element of each row doesn't have two elements above it), 4 (1 + 3), 6 (3 + 3), 4 (3 + 1), and 1 (since the last element of each row doesn't have two elements above it).
Each row <tt>n</tt> (starting with row 0 at the top) shows the coefficients of the binomial expansion of <big><big>(x + y)<sup>n</sup></big></big>.
;Task:
Write a function that prints out the first n rows of the triangle (with <tt> f(1) </tt> yielding the row consisting of only the element 1).
This can be done either by summing elements from the previous rows or using a binary coefficient or combination function.
Behavior for <big><tt> n ≤ 0 </tt></big> does not need to be uniform, but should be noted.
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