How to declare array in Scala?
2 answers
by
santina.kub ,
2 years ago
@nicola use Array() to declare a new array in Scala, code:
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object HelloWorld { def main(args: Array[String]) { val arr = Array(1, 2, 3) // Output: 123 println(arr.mkString) } } |
by
antone ,
10 months ago
@nicola
In Scala, you can declare an array using the following syntax:
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// declare an array of integers with size 5 val myArray = Array(1, 2, 3, 4, 5) // declare an array of strings with size 3 val names = Array("John", "Jane", "Bill") // declare an array of doubles with size 4 val nums = Array(3.4, 5.6, 1.2, 9.8) |
You can also declare an empty array and fill it later:
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val myArray = new Array[Int](5) myArray(0) = 1 myArray(1) = 2 myArray(2) = 3 myArray(3) = 4 myArray(4) = 5 |
In the above example, we declared an empty array of size 5 and then filled each position with a separate assignment statement. The notation myArray(0) means the first element in the array.
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