KIT MotoneAdachi Batch 7 - SMART PHONE APP DEVELOPMENT Assignment on Control structures

/*

Analyze the questions and write proper definition and example code for the following:

(5 X 2 = 10)
1. What are control structures?
2. What are conditional constructs?
3. What are looping constructs?
4. Write a program to get input for 4 numbers and find the smallest among all using if expression.
5. Write a program to input a character and print whether it is vowel or consonant using when expression.

(1 X 10 = 10)
6. Write the different variations of for loop using suitable example programs.

*/

fun main (args : Array<String>) {
    // control structures I will explain these in the following code and comments...
    
    var answerNum: Int = 0
    var answerStr: String = ""
    var answerChar: Char = ' '
    
    for (i in 0..9) { // looping constructs Run from 0 to 9. The value is assigned to variable i in each loop.
        println("Q$i Are you busy? [Y/n]")
        answerStr = readLine().toString()
        if (answerStr == "Y") { // conditional constructs? Checking whether variable answerStr is "Y".
            println("Let's go to bed.")
        } else {
            println("Let's do your work.")
        }
    }
    
    // Write a program to get input for 4 numbers and find the smallest among all using if expression.
    // In four loops with "for", "if" determines whether the input value is smaller than the previous value.
    var min = 0
    for (i in 1..4) {
        println("$i/4 Plz enter number.")
        answerStr = readLine().toString()
        if (!answerStr.isNullOrBlank()) {
            answerNum = answerStr.toInt()
            println(answerStr)
            if (i == 1 || min > answerNum) {
                min = answerNum
            }
        } else {
            println("oops...")
        }
    }
    println("min: $min")

    // Write a program to input a character and print whether it is vowel or consonant using when expression.
    println("Plz enter a any string.")
    answerChar = readLine()!![0]
    
    // This "when" has all vowels set. This is possible than this code to determine whether the input word is a vowel.
    when (answerChar) {
        in "a" -> println("vowel")
        in "i" -> println("vowel")
        in "u" -> println("vowel")
        in "e" -> println("vowel")
        in "o" -> println("vowel")
        else -> println("consonant or not voewl")
    }
    
    // Write the different variations of for loop using suitable example programs.
    for (i in 0..9) {
        println(i)
    }
    
    var i = 0
    while (true) {
        ++i
        println(i)
        if (i == 10) {
            break
        }
    }
    
    i = 0;
    
    do {
        ++i
        println(i)
        if (i == 10) {
            break
        }
    } while (true)
}