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

Elizabeth Tin
Elizabeth Tin
1,025 Points
Posted by Elizabeth Tin
Elizabeth Tin
1,025 Points

Ruby Operator Quiz

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. :)

My answer:

def check_speed(car_speed) car_speed =gets.chomp.to_i end

if (car_speed >= 40) && (car_speed <=50) puts "safe" elsif (car_speed >51) puts "unsafe" end

what did I do wrong?

ruby.rb 
def check_speed(car_speed)
  car_speed = gets.chomp.to_i
end

if (car_speed >= 40) && (car_speed <= 50)
  puts "safe"
elsif (car_speed > 51) 
  puts "unsafe"
end

2 Answers

Ricardo Hill-Henry
Ricardo Hill-Henry
38,442 Points

The if statement should be inside the check_speed method, because that's how the speed is being checked. Using puts and returns are two different things. The puts statement prints out the provided string, and continues execution on the next line. The return statement returns something, then kicks out of the current method, ignoring any code that followed within that method. There's more important differences, but these are the most important here. Also the I believe the question wants you to assume/pretend that the car_speed has been declared at some other point in the class.

def check_speed(car_speed)

  if (car_speed >= 40)&&(car_speed <= 50)
    return "safe"
  else
    return "unsafe"
  end

end
Elizabeth Tin
Elizabeth Tin
1,025 Points
Elizabeth Tin
Elizabeth Tin
1,025 Points

thank you! this is super helpful!