4 kotlin之for循環
var names = arrayOf("a", "b", "c")
//1
for (name in names)
println("3 $name")
//2
for (i in names.indices)
println("4 $i $names[i]")
//3
for ((index, name) in names.withIndex())
println("5 $index $name")
//4
for (index in 1..5) {
println("X $index")
}
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