Hi Andy,

The challenge here is to modify the code to use an elsif rather than just an else.

The elsif allows a second conditional test to take place if the first test has failed. Here, the first test has failed, in the car_speed is not less than speed_limit. So we want to introduce a second test in the elsif to see if car_speed equals speed_limit.

If that condition is met, we want to set a variable called going_speed_limit to true.

To do this, insert before the existing else section of the code. Add the elsif keyword. After this keyword, on the same line, test, using == whether car_speed is equal to speed_limit. Inside the block, on the next line, set going_speed_limit to true using single-equals.

This all looks like:

car_speed = 55
speed_limit = 55

if car_speed < speed_limit
  too_fast = false
elsif car_speed == speed_limit
  going_speed_limit = true
else
  too_fast = true
end

Steve.

My codes would run like this:

car_speed = 55
speed_limit = 55
going_speed_limit = true

if car_speed < speed_limit
 too_fast = false
elsif
going_speed_limit = true
end

=========================== However, I got confused that:

1. There is no variable too_fast.
2. why using elsif when we can use else

Please explain. Th ank you, Steve.

Hi Andy,

This challenge starts with code that sets the value of too_fast to true or false depending whether car_speed is greater or less than the speed_limit. This challenge wants us to add the third option; the case where car_speed equals speed_limit.

For this, we need a new condition as the existing test just lets us know whether car_speed < speed_limit. To introduce a new condition, we use elsif. This allows us to make a new test - so here, we can insert a test to see if car_speed == speed_limit.

This allows a third outcome to come from an if conditional statement. Yes, in this challenge there are some 'made up' variables, too_fast and going_speed_limit are expressly defined but the challenge knows to expect them to be used. Don't worry about it; call it 'artistic licence'.

so, in between the if and the else add an elsif and the new test on the same line. On the next (new) line set the variable going_speed_limit to true. This means the code can handle the three possible outcomes depending on the value of car_speed.

if car_speed < speed_limit
  too_fast = false
elsif car_speed == speed_limit
  going_speed_limit = true
else
  too_fast = true
end

I hope that helps.

Steve.