Please write Pascals triangle is a number triangle with numbers arranged in staggered rows such that

This equation is the equation for a binomial coefficient. You can build Pascals triangle by adding the two numbers that are diagonally above a number in the triangle. An example of Pascals triangle is shown below. (just follow the arrangement below for the output)

1

1 1

1 3 3 1

1 4 6 4 1

Write a program that prints out Pascals triangle. Your program should accept a parameter that tells how many rows of the triangle to print. Please use Python language and add information for helping me understand.

nrr(n-r)