Scala Programming: Rotate one element left of an given array (length 1 or more) of integers

Scala Programming Array Exercise-8 with Solution

Write a Scala program to rotate one element left of an given array (length 1 or more) of integers.

Sample Solution:

Scala Code:

object Scala_Array
{
 
 def rotate_left(arr: Array[Int]): Array[Int] = {
    if (arr.length < 1) false 
    arr.tail :+ arr.head
   }
  def main(args: Array[String]): Unit = 
   {
   val nums1 = Array(1,2,3,4,5,6,7)
   println("Original Array elements:")
   // Print all the array elements
      for ( x <- nums1 ) {
         print(s"${x}, ")        
       }
   println("\nRotate left one element:")  
   var result_left1 = rotate_left(nums1)
        for ( x <- result_left1 ) {
         print(s"${x}, ")        
         }   
   val nums2 = Array(1,2)
   println("\nOriginal Array elements:")
   // Print all the array elements
      for ( x <- nums2 ) {
         print(s"${x}, ")        
       }
   println("\nRotate left one element:")  
   var result_left2 = rotate_left(nums2)
        for ( x <- result_left2 ) {
         print(s"${x}, ")        
         }   
   val nums3 = Array(100)
   println("\nOriginal Array elements:")
   // Print all the array elements
      for ( x <- nums3 ) {
         print(s"${x}, ")        
       }
   println("\nRotate left one element:")  
   var result_left3 = rotate_left(nums3)
        for ( x <- result_left3 ) {
         print(s"${x}, ")        
         }   
   }
}

Sample Output:

Original Array elements:
1, 2, 3, 4, 5, 6, 7, 
Rotate left one element:
2, 3, 4, 5, 6, 7, 1, 
Original Array elements:
1, 2, 
Rotate left one element:
2, 1, 
Original Array elements:
100, 
Rotate left one element:
100, 

Scala Code Editor :

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