Hello
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fun main() {
println("Hello World")
}
Variables
read-only local variables are defined using the keyword val:
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val a: Int = 1
variables that can be reassigned use the var keyword:
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var x = 5
Classes
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class Shape
StringTemplates
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var a = 1
val s1 = "${s1.replace("is", "was")}, but now is $a"