Swift Language Conditionals Ternary operator
Example
Conditions may also be evaluated in a single line using the ternary operator:
If you wanted to determine the minimum and maximum of two variables, you could use if statements, like so:
let a = 5
let b = 10
let min: Int
if a < b {
min = a
} else {
min = b
}
let max: Int
if a > b {
max = a
} else {
max = b
}
The ternary conditional operator takes a condition and returns one of two values, depending on whether the condition was true or false. The syntax is as follows: This is equivalent of having the expression:
(<CONDITION>) ? <TRUE VALUE> : <FALSE VALUE>
The above code can be rewritten using ternary conditional operator as below:
let a = 5
let b = 10
let min = a < b ? a : b
let max = a > b ? a : b
In the first example, the condition is a < b. If this is true, the result assigned back to min will be of a; if it's false, the result will be the value of b.
Note: Because finding the greater or smaller of two numbers is such a common operation, the Swift standard library provides two functions for this purpose: max and min.
