How to print Hollow Diamond Pattern in Ruby

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How to print Hollow Diamond Pattern in Ruby ?

Answer

To print a Hollow Diamond Pattern in Ruby, we use loops and conditional statements to manage spaces and stars.

✐ Examples

1 Print Hollow Diamond Pattern in Ruby

In this example,

We define the number of rows for the diamond pattern, assuming it to be 5.
We use nested loops where the outer loop controls the rows and the inner loop manages spaces and stars.
Conditions within the loops determine when to print stars to create the hollow diamond effect.
We use if-else statements to decide whether to print a space or a star at each position in the pattern.
The outer loop manages the rows of the diamond, incrementing and decrementing based on the midpoint of the diamond.
The inner loop calculates the spaces required to position the stars correctly, ensuring the hollow diamond pattern.

Ruby Program

# Print Hollow Diamond Pattern in Ruby
num_rows = 5

(1..num_rows).each do |row|
  pattern = ' ' * (num_rows - row)
  if row == 1
    pattern += '*'
  else
    pattern += '*' + ' ' * (2 * row - 3) + '*'
  end
  puts pattern
end

(num_rows - 1).downto(1) do |row|
  pattern = ' ' * (num_rows - row)
  if row == 1 || row == num_rows
    pattern += '*'
  else
    pattern += '*' + ' ' * (2 * row - 3) + '*'
  end
  puts pattern
end

Output

    *
   * *
  *   *
 *     *
*       *
 *     *
  *   *
   * *
    *

Summary

In this tutorial, we learned How to print Hollow Diamond Pattern in Ruby language with well detailed examples.