How do you use the ? : (conditional) operator in JavaScript?

Question

Can anyone help me what is conditional operators(?:) and how I can able to use it?

Answer 1

Basically, a conditional operator is a one-line statement of if-else statement. Given below is an example of it:

var userType;

if (userIsYoungerThan18) {

  userType = "Minor";

} else {

  userType = "Adult";

}

if (userIsYoungerThan21) {

  serveDrink("Orange Juice");

} else {

  serveDrink("Beer");

}

This code can be shortened by using conditional operator as:

var userType = userIsYoungerThan18 ? "Minor" : "Adult";

serveDrink(userIsYoungerThan21 ? "Grape Juice" : "Wine");

I hope this will help.

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