Okay, so I'm currently trying to write the code for a very inaccurate stoplight--one that is only meant to help me understand what I've learned, but I can't seem to figure it out! In my code, at the very end, I say print("Green Light!") after setting up a few variables, but I would like to indicate what the computer should do instead of flat out saying "print this phrase," if that makes sense... not sure it does.
How would I write this if I wanted to simply print the Boolean value of greenLight without saying print("Green Light!")?
I'm very much a beginner and I might be asking the wrong question--I know that, but I'm hoping someone can help!
Something tells me I haven't learned enough to do this, yet, but I really wanna know how this works.
This is what I've written so far. It runs, but I would like to change it so all I have to say is print(greenLight) or print(Bool).
When I try putting in print(greenLight), it returns an error:
Output: Review.swift:14:7: error: variable 'greenLight' used before being initialized print(greenLight) ^ Review.swift:4:5: note: variable defined here var greenLight: Bool ^
var carAtRightIntersection = false
var carAtLeftIntersection = false
var carStraightAhead = true
var greenLight: Bool
if !(carAtRightIntersection && carAtLeftIntersection) && carStraightAhead {
greenLight = true
}
if carAtRightIntersection && carAtLeftIntersection && !(carStraightAhead) {
greenLight = false
}
print("Green light!")
If you don't want to print the actual phrases, You could use a switch case statement
switch greenLight{
case true:
print("Green Light!")
case false:
print("Red Light!")
default:
print("Yellow Light!")
}
After the first block executes
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