输出10行的杨辉三角 - 二项式的n次方展开系数
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def main():
num = int(input(
'Number of rows: '))
yh = [[]] * num
for row
in range(len(yh)):
yh[row] = [
None] * (row +
1)
for col
in range(len(yh[row])):
if col ==
0 or col == row:
yh[row][col] =
1
else:
yh[row][col] = yh[row -
1][col] + yh[row -
1][col -
1]
print(yh[row][col], end=
'\t')
print()
if __name__ ==
'__main__':
main()
