Python Exercise: Print out the first n rows of Pascal's triangle

Python Functions: Exercise-13 with Solution

Write a Python function that that prints out the first n rows of Pascal's triangle.

Note : Pascal's triangle is an arithmetic and geometric figure first imagined by Blaise Pascal.

Sample Pascal's triangle :

Each number is the two numbers above it added together

Sample Solution :-

Python Code :

def pascal_triangle(n):
   trow = [1]
   y = [0]
   for x in range(max(n,0)):
      print(trow)
      trow=[l+r for l,r in zip(trow+y, y+trow)]
   return n>=1
pascal_triangle(6) 

Sample Output:

[1]                                                                                                           
[1, 1]                                                                                                        
[1, 2, 1]                                                                                                     
[1, 3, 3, 1]                                                                                                  
[1, 4, 6, 4, 1]                                                                                               
[1, 5, 10, 10, 5, 1]  

Flowchart:

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python function that checks whether a passed string is palindrome or not.
Next: Write a Python function to check whether a string is a pangram or not.