Summary - Strings

Combine templates, methods and split to write a business card.

Summary - Strings

In this summary you'll combine templates, methods and split to build a business card. In previous lessons you learned:

String templates with $ and ${}
methods like uppercase() and trim()
taking slices with substring(start, end)
dividing with split and swapping with replace

Using them together keeps real text tasks short. We'll do two mini tasks: print a cleaned name and split a comma-separated first and last name.

Exercise Print the card name

Write a fun main(). Assign " alex " (lowercase, with spaces) to val name. Print the cleaned and capitalized name with println(name.trim().uppercase()).

Show example solution

fun main() {
    val name = "  alex  "
    println(name.trim().uppercase())
}

Exercise Split first and last name

Write a fun main(). Assign "alex,smith" (comma-separated) to val full. Split it in two with val parts = full.split(","). Print parts[0] for the first name and parts[1] for the last name on separate lines.

Show example solution

fun main() {
    val full = "alex,smith"
    val parts = full.split(",")
    println(parts[0])
    println(parts[1])
}

Test yourself

You want to clean and capitalize a name for a card. Which chain is right?
- name.uppercase().trim()
- name.split(",")
- name.trim().uppercase()
- name.trim().lowercase()
Show answer

name.trim().uppercase() — First trim cuts spaces, then uppercase makes capitals.

Complete the name template

val card = "Name: ____"

Show answer

val card = "Name: ${parts[0]}"

Next lesson: The if statement

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