Pascal's Triangle Printing | Dataford Interview Questions

Build a Pascal's Triangle by printing each line.

Implement pascal_triangle(num_rows) to return the rows in order, where each row is a list of integers. The caller can print each returned row as one line. For zero rows, return an empty list.

Input: A non-negative integer num_rows.

Output: A list containing num_rows rows of Pascal's Triangle.

Examples:

num_rows = 5 returns [[1], [1, 1], [1, 2, 1], [1, 3, 3, 1], [1, 4, 6, 4, 1]].
num_rows = 0 returns [].

Constraints: 0 <= num_rows <= 30.

Constraints

0 <= num_rows <= 30
Rows must be returned in top-to-bottom order
Every row must contain positive integers

Function Signature

def pascal_triangle(num_rows):

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