Ternary operator in

About Ternary operator

Ternary operator is a short form of an if-else statement. It takes a boolean expression and two expressions separated by a colon. The first expression is evaluated if the boolean expression is true, otherwise the second expression is evaluated. It has the following setup: Boolean-expression ? expression1 : expression2.

The ternary operator is great when you want a short form of an if-else statement and the expressions are short:

let showFahrenheit = true
let temperatureInCelsius = 30

let temperature = showFahrenheit ? temperatureInCelsius * 9 / 5 + 32 : temperatureInCelsius
print(temperature)
// Prints 86

The example above is shorthand for the code below:

let showFahrenheit = true
let temperatureInCelsius = 30

let temperature = if showFahrenheit {
    temperatureInCelsius * 9 / 5 + 32
} else {
    temperatureInCelsius
}