Yield और ब्लॉक पास करना

def square(num)
  yield num * num
end

square(4) { |result| puts "Square: #{result}" }

def greet
  if block_given?
    yield
  else
    puts 'No block given'
  end
end

greet

greet { puts 'Hello from block!' }

def execute_block(&block)
  block.call if block
end

execute_block { puts 'Block executed!' }

def repeat(times)
  times.times { yield }
end

repeat(3) { puts 'Hello!' }

def execute_proc(proc)
  proc.call
end

my_proc = Proc.new { puts 'Proc executed!' }
execute_proc(my_proc)

def execute_lambda(lmbd)
  lmbd.call
end

my_lambda = -> { puts 'Lambda executed!' }
execute_lambda(my_lambda)