# Ruby program to illustrate 
# use of else statement
  
 begin
         
    # using raise to create an exception  
    # raise 'Exception Created!'
   
    puts 'no Exception raise' 
  
    # using Rescue method
    rescue    
        puts 'Finally Saved!'
  
   #  using else statement
   else
        puts 'Else block execute because of no exception raise'
       
   # using ensure statement  
   ensure
      puts 'ensure block execute'
end

# Ruby program to illustrate 
# use of catch and throw statement
  
# defining a  method 
def catch_and_throw(value)
  
  puts value
  a = readline.chomp
  
  # using throw statement
  throw :value_e if a == "!"
  return a
  
end
  
# using catch statement
catch :value_e do
  
# enter number
  number = catch_and_throw("Enter Number: ")
end

# Ruby program to create the user 
# defined exception and handling it
   
# defining a method
def raise_and_rescue     
  begin
         
    puts 'This is Before Exception Arise!'
         
    # using raise to create an exception  
    raise 'Exception Created!'
   
    puts 'After Exception' 
   
  # using Rescue method
  rescue    
    puts 'Finally Saved!'    
     
end    
   
puts 'Outside from Begin Block!'    
   
end    
   
# calling method
raise_and_rescue

# Ruby program to illustrate 
# use of retry statement
    
  begin
         
    # using raise to create an exception  
    raise 'Exception Created!'
   
    puts 'After Exception' 
   
  # using Rescue method
  rescue    
    puts 'Finally Saved!'
    
# using retry statement  
retry
end

# Ruby program to illustrate 
# use of raise statement
  
begin
         
    puts 'This is Before Exception Arise!'
         
       # using raise to create an exception  
       raise 'Exception Created!'
   
    puts 'After Exception' 
end

# Ruby program to illustrate 
# use of ensure statement
  
  begin
         
    # using raise to create an exception  
    raise 'Exception Created!'
   
    puts 'After Exception' 
   
  # using Rescue statement
  rescue    
    puts 'Finally Saved!'
    
# using ensure statement  
ensure
   puts 'ensure block execute'
end