4. Count with a loop

Replace App.kalm to practice counting words before adding file I/O:

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pub fun main() -> Unit:
    fix text = "a   quiet morning"
    var words = 0
    for word in text.split("\\s+"):
        if not word.isBlank():
            words += 1
    sayLine(@"$words words")

Java's split accepts a regular expression. \\s+ matches consecutive whitespace; the doubled slash is the string escape. The blank check makes empty input count as zero words. for traverses the array with an immutable loop binding.

kalm run

3 words

Try empty text, leading spaces, and tabs. They should not add words.

Functions and flow covers branches and loop control.