Kotlin Program:

Example:

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

fun main(args: Array<String>) {
  var c:Char = 'A'
  println("Alphabets from A to Z :")
  for(i in 0..25)
    print(c++ +" ");
}

Output:

Alphabets from A to Z :
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Here, we just used 'for loop' for 26 alphabet characters

var c:Char = 'A' //set the 1st character 
for(i in 0..25)
  print(c++ +" ");

You can print the same in small alphabets, just set c='a'