Recap - Indexed Letters

Part of the Fundamentals section of Coddy's Kotlin journey. Lesson 78 of 93.

Challenge

Medium

Read an ASCII text line. Print each letter in uppercase preceded by its zero-based position and a colon plus space, one letter per line. Ignore digits, spaces and punctuation. If the line contains no letters, print No letters.

Try it yourself

fun main() {
    val text = (readLine() ?: "")
    // Print the indexed letters.
}

All lessons in Fundamentals

1Introduction

The Language Hello World!Comments Recap - Launch Message

4Operators Part 1

Arithmetic Operators Modulo Operator Augmented Assignment Comparison Operators Recap - Simple Math

7Basic IO

Println Function String Templates ReadLine Input Type Conversion Recap - Years Until Retirement Recap - True or False

10Functions

Declare A Function Parameters And Arguments Return Values Named Arguments Default Values Single Expression Functions Recap - Sigma Function Recap - Validation Function

13Iterating Over Sequences

Iterating Over Elements WithIndex Method Iterating Over Strings P1 Iterating Over Strings P2Recap - Indexed Letters

16Final Challenges

Flat Asterisk Pyramid Pattern Finder What To Buy

Practice on your own: Kotlin playground