Page 212 - Computer Science V2.0 Class 11

Program 8.1: To display a triangle, a rhombus, and a triangle again.

01 #Print a triangle
02 print(" * ")
03 print(" *** ")
04 print(" ***** ")
05 print(" ******* ")
06 print()
07 #Print a rhombus
08 print(" * ")
09 print(" *** ")
10 print(" ***** ")
11 print(" ******* ")
12 print(" ***** ")
13 print(" *** ")
14 print(" * ")
15 print()
16 #Print a triangle
17 print(" * ")
18 print(" *** ")
19 print(" ***** ")
20 print(" ******* ")
On executing the above program, Python responds with the following output:
*
***
*****
*******

*
***
*****
*******
*****
***
*

*
***
*****
*******
Fig 8.1: Output on execution of Program 8.1

The above program suffers from the following two drawbacks:
● Although the printing the triangle and rhombus are independent activities, it is not clearly visible in the program.
● The code for printing the triangle appears twice.
We already know that the functions provide a systematic approach to problem-solving by dividing a complex problem
into simpler sub-problems, developing solutions for each sub-problem, and combining the individual solutions of the
sub-problems to solve the original problem. So, to overcome the above drawbacks, we will develop functions named
triangle and rhombus to print a triangle and a rhombus, respectively. A Python program is a global frame in which
functions and statements appear.

198 Touchpad Computer Science (Ver. 2.0)-XI