Conditional Expression

var myAge = 22
var sisterAge = 21
myAge == sisterAge // false
myAge !== sisterAge // true

var height = 46 // inches
if (height in 1..53) {
  println("Sorry, you must be at least 54 inches to ride the coaster")
}
// Prints: Sorry, you must be at least 54 inches to ride the roller coaster

var grade = "A"
when (grade) {
  "A" -> println("Great job!")
  "B" -> println("Great job!")
  "C" -> println("You passed!")
  else -> println("Close! Be sure to prepare more next time!")
}
// print: Great job!

var studied = true
var well Rested = true
if (wellRested) {
  println("Good luck today!")
  if (studied) {
    println("You should prepare for the exam!")
  } else {
    println("Spend a few hours studying before the exam!")
  }
}
// Print: Good luck today!
// print: You should be ready for the exam!

!true && (false || true) // false
/\*
(false || true) is evaluated first to return true.
Then, evaluate !true && true and return the final result false
\*/
!false && true || false // true
/\*
!false is evaluated first to return true.
Then true && true is evaluated, returning true.
then, true || evaluates to false and eventually returns true
\*/

var hungry = true
var full = false
println(!hungry) // false
println(!full)   // true

var late = true
var skipBreakfast = true
var underslept = false
var checkEmails = false
// true OR true
println(skipBreakfast || late) // true
// true OR false
println(late || checkEmails)   // true
// false OR true
println(underslept || late)    // true
// false OR false
println(checkEmails || underslept) // false

var humid = true
var raining = true
var shorts = false
var sunny = false
// true AND true
println(humid && raining) // true
// true AND false
println(humid && shorts)  // false
// false AND true
println(sunny && raining) // false
// false AND false
println(shorts && sunny)  // false

var humid = true
var raining = true
var jacket = false
println(!humid)
// print: false
println(jacket && raining)
// print: true
println(humid || raining)
// print: true

var myAge = 19
var sisterAge = 11
var cousinAge = 11
myAge > sisterAge  // true
myAge < cousinAge  // false
myAge >= cousinAge // true
myAge <= sisterAge // false

var age = 65
if (age < 18 ) {
  println("You are considered a minor")
} else if (age < 60) {
  println("You are considered an adult")
} else {
  println("You are considered senior")
}
// print: you are considered senior

var rained = false
if (rained) {
  println("No need to water the plants today.")
} else {
  println("The plant needs to be watered!")
}
// print: The plant needs watering!

var morning = true
if (morning) {
  println("Rise and shine!")
}
// Print: Rise and shine!