Scala: while loop

Unlike ‘for’ loop, while and do-while loop are not expressions, these are pure statements. You can convert a ‘for’ from statement to expression using ‘yield’ keyword, but while, do-while loops are pure statements. 

Syntax

while(condition) {

     ......

     ......

}

 

Example: Print even numbers till 10 (exclusive)

while(i < 10){

     println(s"i = $i")

     i += 2

}

scala> var i = 2
var i: Int = 2

scala> while(i < 10){
     |   println(s"i = $i")
     |  i += 2
     | }
i = 2
i = 4
i = 6
i = 8

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