if statements). It looks something like this:
const hoursOfSleep = 5
const timeForSleep =
hoursOfSleep < 8
? 'Yup, no more phone for you'
: "Ah nah, a few more minutes of phone time won't hurt"
Notice the ? and the :
These are the important parts.
If the condition (in this case
hoursOfSleep) in front of the question mark evaluates to true, the value of the first expression before the colon is returned. If the condition in front of the question mark evaluates to false, the value of the second expression after the colon is returned. As you can see, if you have had less than 8 hours of sleep, you shouldn't be using your phone.
Ternary operators are really flexible and can be used in a number of ways. You can stack them together:
const catsRule = true,
const dogsDrool = false,
const catDog = catsRule ?
(dogsDrool ? "Let's all live in harmony": "Both cats and dogs drool") :
(dogsDrool ? "Dogs are cool, nearly as cool as cats" : "Dogs and cats can be friends");
"Both cats and dogs drool", and it's also total nonsense but I hope you had fun staring at it and trying to figure it out. You don't even need to use the parentheses, and can also use multiple statements separated by commas. You can return statements in functions. You can use them in place of bulky
if/else statements with much nicer-to-read code. The question mark means
if and the colon means