Execution Before or After a Program : BEGIN END « Statement « Ruby






  1. Ruby
  2. Statement
  3. BEGIN END

Execution Before or After a Program


# BEGIN and END code to execute before and after a program runs. 
# Both BEGIN and END are followed by blocks enclosed by braces ({})

BEGIN { puts "Date and time: " + Time.now.to_s }
def bmi( weight, height )
  703.0*( weight.to_f/(height.to_f**2))
end

my_bmi = bmi( 196, 73 )

puts "Your BMI is: " + x = sprintf( "%0.2f", my_bmi )

END { puts "You've got some work ahead of you." }








Related examples in the same category

1.The code in a block labeled with the keyword BEGIN is run automatically when a Ruby program is loaded
2.The code in a block labeled END is automatically run when the program finishes.