How to print Pascal's Triangle Pattern in Ruby - Step by Step Examples

How to print Pascal's Triangle Pattern in Ruby ?

Answer

To print Pascal's Triangle Pattern in Ruby, you can use nested loops where the outer loop controls the rows and the inner loop calculates the values for each row based on the binomial coefficient formula.

✐ Examples

1 Pascal's Triangle Pattern

In this example,

We use a variable n to represent the number of rows in Pascal's triangle.
We initialize a 2D array pascal to store the triangle values.
We use nested loops to calculate and store the values using the binomial coefficient formula.
We print the triangle values using a formatted output.

Ruby Program

def print_pascals_triangle(n)
  pascal = Array.new(n) { Array.new(n, 0) }
  n.times do |i|
    (i + 1).times do |j|
      if j == 0 || j == i
        pascal[i][j] = 1
      else
        pascal[i][j] = pascal[i - 1][j - 1] + pascal[i - 1][j]
      end
      print pascal[i][j], ' '
    end
    puts
  end
end

rows = 5
print_pascals_triangle(rows)

Output

Summary

In this tutorial, we learned How to print Pascal's Triangle Pattern in Ruby language with well detailed examples.

◀ Previous Next ▶

Ruby Tutorials

Ruby How-Tos