Page 320 - Computer Science V2.0 Class 11

Program 11.16 Write a function diamond(nRows,symbol) to display the diamond pattern of a symbol.

01 def diamond(nRows, symbol):
02 '''
03 Objective: To display a diamond pattern
04 Inputs:
05 nRows : number of rows
06 symbol: symbol to be used in the pattern
07 Return value: None
08 '''
09 #Approach: Ensure nRows is even
10 #Invoke functions isoscelesTriangle, invertedIsoTriangle
11 assert nRows%2==0, 'A diamond must have even no of rows'
12 isoscelesTriangle(nRows//2, symbol)
13 invertedIsoTriangle(nRows//2, symbol)
>>> diamond(10, '8')

Sample Output:
8
888
88888
8888888
888888888
88888888888
88888888888
888888888
8888888
88888
888
8
Fig 11.9: Diamond

11.7.3 Sharp Diamond
Note that the diamond is not sharp at the horizontal edges. If you are happy with this form of diamond, nothing needs
to be done. If not, we must sharpen the edges. To sharpen the edges, we simply need to drop either of the two rows

with the maximum number of symbols, resulting from execution of isoscelesTriangle(nRows//2, symbol)
and invertedIsoTriangle(nRows//2, symbol) in Function 11.9. In Function 11.10, we dropped one row
from lower inverted isosceles triangle by invoking invertedIsoTriangle(nRows//2-1, symbol).

Program 11.17 Write a function sharpDiamond(nRows,symbol) to display the sharp diamond pattern of a symbol.

01 def sharpDiamond(nRows, symbol):
02 '''
03 Objective: To display a diamond pattern
04 Inputs:
05 nRows : number of rows
06 symbol: symbol to be used in the pattern
07 Return value: None
08 '''
09 #Approach: Ensure nRows is even
10 #Invoke functions isocelesTriangle, invertedIsoTriangle
11 assert nRows%2==0, 'A diamond must have even no of rows'
12 isoscelesTriangle(nRows//2, symbol)
13 invertedIsoTriangle(nRows//2-1, symbol)
>>> sharpDiamond(12,'*')

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