Lära Working with Strings | Kotlin Variables and Data Types

Strings are essential for working with text in any programming language. In Kotlin, you can join, or concatenate, strings using the + operator, but Kotlin also offers a more powerful feature: string templates. String templates let you embed variables and expressions directly inside a string using the $ symbol, making your code cleaner and easier to read. Here is how you can use both string concatenation and templates in Kotlin:

Main.kt


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package com.example

fun main() {
    val firstName = "Ada"
    val lastName = "Lovelace"
    // String concatenation using +
    val fullName = firstName + " " + lastName
    println("Concatenated name: " + fullName)

    // String template with variables
    val greeting = "Hello, $firstName $lastName!"
    println(greeting)

    // String template with an expression
    val nameLength = "Your full name has ${fullName.length} characters."
    println(nameLength)
}

This code demonstrates several ways to work with strings in Kotlin. The fullName variable uses the + operator to concatenate firstName, a space, and lastName. The greeting variable shows a string template, where $firstName and $lastName are placed directly inside the string, making the code concise and readable. The nameLength variable goes further by embedding an expression inside ${}—in this case, calculating the length of the full name. String templates let you easily include variable values or even run code within your strings.

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Main.kt


              123456789101112131415161718
            
package com.example

fun main() {
    val firstName = "Ada"
    val lastName = "Lovelace"
    // String concatenation using +
    val fullName = firstName + " " + lastName
    println("Concatenated name: " + fullName)

    // String template with variables
    val greeting = "Hello, $firstName $lastName!"
    println(greeting)

    // String template with an expression
    val nameLength = "Your full name has ${fullName.length} characters."
    println(nameLength)
}

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 4