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Ruby Ruby Operators and Control Structures Logical Operators The And (&&) Operator

Posted by Aine Dunphy
Aine Dunphy
3,265 Points

Ruby Operators && (from novice)

As a novice, attempting to work through required Ruby task objectives. Too too much time effort/attempts have been spent on the following task objective.... much needed guidance required.

Anyone!?!?

The method below checks the speed of a car and returns a string value: either "safe" or "unsafe". Return "safe" if: The car_speed passed in as an argument is greater than or equal to the number 40. The car_speed passed in as an argument is less than or equal to the number 50. Otherwise, return "unsafe". Hint: You should use the && logical operator to accomplish this task. :)

ruby.rb 
def check_speed(car_speed)
  if (car_speed >40) && (car_speed <50)
    puts "safe"
  else
    puts "unsafe"
end

3 Answers

Steve Hunter
Steve Hunter
57,712 Points

The question also asks for the strings to be returned, not just displayed to the screen. (And you're missing an end too)

You can do that by just stating the string:

def check_speed(car_speed)
  # write your code here
  if (car_speed >= 40) && (car_speed <= 50)
    "safe"
  else
    "unsafe"
  end
end

Or you can explicitly return it using the keyword - I think it is clearer this way:

def check_speed(car_speed)
  # write your code here
  if (car_speed >= 40) && (car_speed <= 50)
    return "safe"
  else
    return "unsafe"
  end
end

I hope that all helps!

Steve.

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Looks fine but the requirements says greater and less than and equal to, so try with <= and >=

Steve.

[EDIT: attempting to get this thing to display the less than and equal to sign correctly - as soon as you use an opening HTML tag, it all goes wrong!]

[EDIT2: gives up - see the code below!]

Aine Dunphy
Aine Dunphy
3,265 Points
Aine Dunphy
Aine Dunphy
3,265 Points

Yep - that helps a lot!!
Got it "now" you've just renewed my faith. I can move on with a little more confidence Next (issue)!

Steve Hunter
Steve Hunter
57,712 Points

Keep plugging away - it does become more straightforward! Ruby is a bit esoteric, at times! Just shout in the forum if you're stuck - @ mention me if you want a quick response ... I'll get that notification emailed to me.