循环

循环

while 略

for

val arr = Array(1 to 5:_*)
for(i <- arr){
println(i)
}

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2
3
4
5

for(i <- 1 to 3; j <- 4 to 6){
println(s"i=$i j=$j")
}

i=1 j=4
i=1 j=5
i=1 j=6
i=2 j=4
i=2 j=5
i=2 j=6
i=3 j=4
i=3 j=5
i=3 j=6

scala> for(i <- 1 to 5 if i < 3) println(i)
1
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scala> val vec = for(i <- 1 to 5) yield i
vec: scala.collection.immutable.IndexedSeq[Int] = Vector(1, 2, 3, 4, 5)
 
scala> vec.to
to        toBuffer       toIterable   toList   toParArray   toSet      toString        toVector
toArray   toIndexedSeq   toIterator   toMap    toSeq        toStream   toTraversable
 

break

import scala.util.control.Breaks._
 
breakable {
    for (i <- 1 to 10) {
        if (i == 3) break()
        println(i)
    }
}

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