Practice Time: getFortuneCookie() - Version 2

Practice Time:

Loops

This lesson introduced the while and repeat loops. To practice using them, do the following:

• Change your fortune cookie program to use repeat() instead of a for loop. What happens to the break instruction? Using the error message from the compiler, with what you've learned so far, can you think of why?
• Change your fortune cookie program to use a while loop, which is the better choice when you are looping until a condition is met.

/** File:           Main.kt
 * Description:     Create a program with a function that returns a fortune
 *                  cookie message that you can print.
 * Programmer:      Nolverto Urias Obesoo
 * Creation Date:   06/13/2023
 */

fun main(args: Array<String>) {
    // Use a for loop to run the program 10 times
//    for (iteration in 0..9){
//        println("Your fortune is: ${getFortuneCookie(getBirthday())}\n")
//    }

    // Use repeat() instead of a for loop to run the program 10 times
//    repeat(10){
//        println("Your fortune is: ${getFortuneCookie(getBirthday())}\n")
//    }

    // Change your fortune cookie program to use a while loop, which is the better choice
    // when you are looping until a condition is met.
    var iteration: Int = 0
    while(iteration < 10){
        println("Your fortune is: ${getFortuneCookie(getBirthday())}\n")
        iteration++
    }
}

fun getFortuneCookie(birthday: Int): String{
    val fortuneList = listOf(
        "You will have a great day!",
        "Things will go well for you today.",
        "Enjoy a wonderful day of success.",
        "Be humble and all will turn out well.",
        "Today is a good day for exercising restraint.",
        "Take it easy and enjoy life!",
        "Treasure your friends because they are your greatest fortune.")

    // You can use toIntOrNull() to convert a number as a String to an Integer numeric.
    // If the user enters "", toIntOrNull returns null.
    // The next line gets the indexFortune calculating the reminder beteen the birthday and size of fortuneList
    var indexFortune: Int? = birthday.mod(fortuneList.size)

    when(birthday){
        in 28..31 -> indexFortune = 0
        else            -> indexFortune = birthday.mod(fortuneList.size)
    }

    return fortuneList[indexFortune!!]
}

fun getBirthday(): Int{
    print("Enter your birthday: ")

    // Use readLine() to read a line of input (completed with Enter) as a String.
    val birthday = readLine()!!

    return birthday.toInt()
}

Output:

Enter your birthday: 1
Your fortune is: Things will go well for you today.

Enter your birthday: 2
Your fortune is: Enjoy a wonderful day of success.

Enter your birthday: 3
Your fortune is: Be humble and all will turn out well.

Enter your birthday: 4
Your fortune is: Today is a good day for exercising restraint.

Enter your birthday: 5
Your fortune is: Take it easy and enjoy life!

Enter your birthday: 6
Your fortune is: Treasure your friends because they are your greatest fortune.

Enter your birthday: 7
Your fortune is: You will have a great day!

Enter your birthday: 8
Your fortune is: Things will go well for you today.

Enter your birthday: 9
Your fortune is: Enjoy a wonderful day of success.

Enter your birthday: 10
Your fortune is: Be humble and all will turn out well.


Process finished with exit code 0