Print Pascal's Triangle for N Rows in Python

When it is required to print the pascal’s triangle for a specific number of rows, where the number is entered by the user, a simple ‘for’ loop is used.

Below is the demonstration of the same −

Example

 Live Demo

from math import factorial

input = int(input("Enter the number of rows..."))
for i in range(input):
   for j in range(input-i+1):

      print(end=" ")

   for j in range(i+1):
      print(factorial(i)//(factorial(j)*factorial(i-j)), end=" ")

print()

Output

Enter the number of rows...6
      1
     1 1
    1 2 1
   1 3 3 1
  1 4 6 4 1
1 5 10 10 5 1

Explanation

• The required packages are imported.

• The number of rows is taken as input from the user.

• The number is iterated over in the form of a nested loop.

• The factorial method is used to print the pascal’s triangle on the console.