while (condition)
{
    // Code to be executed
}

// Scala program of while loop
 
// Creating object
object GFG
{
    // Main method
    def main(args: Array[String])
    {
        // variable declaration (assigning 5 to a)
        var a = 5
 
        // loop execution
        while (a > 0)
        {
            println("a is : " + a)
            a = a - 1;
        }
    }
}

a is : 5
a is : 4
a is : 3
a is : 2
a is : 1

// Scala program of while loop
 
// Creating object
object GFG
{
   // Main method
   def main(args: Array[String])
   {
       // variable declaration (assigning 5 to a)
       var a = Array("do_while", "for", "while")
       var index = 0
        
       // loop execution
       while (index < a.length)
       {
           if(a(index) == "while")
               println("index of while is " + index)
           index = index + 1
       }
   }
}

index of while is 2

do {

// statements to be Executed

} while(condition);

// Scala program of do-while loop
 
// Creating object
object GFG
{
    // Main method
    def main(args: Array[String])
    {
        // variable declaration (assigning 5 to a)
        var a = 5;
 
        // loop execution
        do
        {
            println("a is : " + a);
            a = a - 1;
        }
        while (a > 0);
    }
}

a is : 5
a is : 4
a is : 3
a is : 2
a is : 1

// Scala program for do-while loop
 
// Creating object
object GFG
{
    // Main method
    def main(args: Array[String])
    {
        // Declaring an array
        var a = Array("hello", "This", "is", "geeksforgeeks", "bye")
        var str = "bye"
        var i = 0
         
        // loop execution
        do
        {
            println("program is saying " + a(i));
            i = i + 1;
        }
        while (a(i) != str);
    }
}

program is saying hello
program is saying This
program is saying is
program is saying geeksforgeeks