Summary - Strings
- Kotlin course
- Beginner
- Lesson 35/116
- 5 min
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()andtrim() - taking slices with
substring(start, end) - dividing with
splitand swapping withreplace
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.
Practice 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()).
Starter code
fun main() {
// Clean and capitalize the name
}Sample solution
fun main() {
val name = " alex "
println(name.trim().uppercase())
}Expected output
ALEX
Practice 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.
Starter code
fun main() {
// Split first and last name
}Sample solution
fun main() {
val full = "alex,smith"
val parts = full.split(",")
println(parts[0])
println(parts[1])
}Expected output
alex smith
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 You want to clean and capitalize a name for a card. Which chain is right?
- name.uppercase().trim()
- name.split(",")
- name.trim().uppercase() Correct answer
- name.trim().lowercase()
Explanation: First trim cuts spaces, then uppercase makes capitals.
2 Complete the name template
val card = "Name: ____"val card = "Name: ${parts[0]}"Explanation: ${parts[0]} embeds the first list item into the template.