So what is a loop ?
loops allow us to execute a statement or a block of statements multiple times. Like conditional statements, they are controlled by boolean expressions.

The while Statement

• A while statement has the following syntax:
• If the condition is true, the statement is executed
• Then the condition is evaluated again, and if it is still true, the statement is executed again
• The statement is executed repeatedly until the condition becomes false

while(condition){
   statement();
}

The do Statement

The body of a do loop executes at least once

do {
   statement();
} 
while( condition );

Example :

object Demo {
  def main(args: Array[String]) {
    var x = 0;
    
    while (x < 10) {
      println("x = "+ x);
      x +=1; // x = x + 1
    }
    
    var y = 0;
    do {
      println("y = " + y);
      y +=1;
    } while (y < 10);

  }
}