PFB1/chapter7_code_to_copy.txt at master · TimLavers/PFB1 · GitHub

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P53
fun main(args: Array<String>) {
    val str = "Hello World!"
    val l = str.length
    println("Length: $l" )
}


P54
package pfb.basics

fun main(args: Array<String>) {
    val str = "Hello World!"
    val l = str.length
    println("Length: $l")
    val upperCase = str.toUpperCase()
    println(upperCase)
    val lowerCase = str.toLowerCase()
    println(lowerCase)
}


P55
package pfb.basics

fun main(args: Array<String>) {
    val str = "Kotlin!"
    for (c in str) {
        println(c)
    }
}


P56
fun main(args: Array<String>) {
    val str = "Kotlin!"
    var numberOfSpaces = 0
    for (c in str) {
        for (n in 0..numberOfSpaces) {
            print(" ")
        }
        println(c)
        numberOfSpaces = numberOfSpaces + 1
    }
}


package pfb.basics

fun main(args: Array<String>) {
    val str = "How long is a piece of string?"
    var spaceCount = 0
    for (c in str) {
        if (c == ' ') {
            spaceCount = spaceCount + 1
        }
    }
    println("Number of spaces: $spaceCount")
}


P57
fun main(args: Array<String>) {
    val msg = "Hello" + " " + "World!"
    println(msg)
}


fun main(args: Array<String>) {
    val str = "There is a bunker!"
    var noSpaces = ""
    for (c in str) {
        if (c != ' ') {
            noSpaces = noSpaces + c
        }
    }
    println(noSpaces)
}


P58
package pfb.basics

fun main(args: Array<String>) {
    val str = "back"
    var result = ""
    for (c in str) {
        result = result + c
    }
    println(result)
}

----------------------------------------

P59
package pfb.basics

fun main(args: Array<String>) {
    val str = "How long is a piece of string?"
    var count = 0
    for (c in str) {
        if (c == 'a') {
            count = count + 1
        }
    }
    println("Count: $count")
}


package pfb.basics

fun main(args: Array<String>) {
    val str = "How long is a piece of string?"
    var count = 0
    for (c in str) {
        if (c == 'a' || c == 'e') {
            count = count + 1
        }
    }
    println("Count: $count")
}


P60
package pfb.basics

fun main(args: Array<String>) {
    val str = "How long is a piece of string?"
    var count = 0
    for (c in str) {
        if (c == 'a') {
            count = count + 1
        }
        if (c == 'e') {
            count = count + 1
        }
    }
    println("Count: $count")
}


package pfb.basics

fun main(args: Array<String>) {
    val str = "How long is a piece of string?"
    var count = 0
    for (c in str) {
        if (c == 'a' || c == 'e' || c == 'i'|| c == 'o'|| c == 'u') {
            count = count + 1
        }
    }
    println("Count: $count")
}

P61
package pfb.basics

fun main(args: Array<String>) {
    val str = "Are we there yet?"
    var count = 0
    for (c in str) {
        val l = c.toLowerCase()
        if (l == 'a' || l == 'e' || l == 'i'|| l == 'o'|| l == 'u') {
            count = count + 1
        }
    }
    println("Count: $count")
}


P62
package pfb.basics

fun main(args: Array<String>) {
    val str = "Mind the   gap!"
    var compacted = ""
    var previousCharWasASpace = false
    for (c in str) {
        if (c == ' ') {
            if (!previousCharWasASpace) {
                compacted = compacted + c
            }
            previousCharWasASpace = true
        } else {
            compacted = compacted + c
            previousCharWasASpace = false
        }
    }
    println(compacted)
}


package pfb.basics

fun main(args: Array<String>) {
    val str = "back"
    var result = ""

    val c_0 = 'b'
    result = result + c_0

    val c_1 = 'a'
    result = result + c_1

    val c_2 = 'c'
    result = result + c_2

    val c_3 = 'k'
    result = result + c_3

    println(result)
}


P63
package pfb.basics

fun main(args: Array<String>) {
    val str = "That's weird!"
    var reversed = ""
    for (c in str) {
        reversed = c + reversed
    }
    println(reversed)
}