KOTLIN Tutorial

Strings in Kotlin

Strings in Kotlin are objects that represent sequences of characters. You can use them like in most modern languages, but Kotlin also gives you some powerful tools!

1. Declaring Strings

val name = "Kotlin"
val greeting = "Hello, $name!"
println(greeting)
  

Output: Hello, Kotlin!

2. Multiline Strings

Kotlin allows you to write strings over multiple lines using triple quotes """.

val message = """
    Dear User,
    Welcome to Kotlin Tutorials!
    Regards,
    Team
""".trimIndent()

println(message)
  

3. String Properties & Functions

Strings are objects with properties and methods:

val language = "Kotlin"
println(language.length)         // Number of characters
println(language.uppercase())    // KOTLIN
println(language.lowercase())    // kotlin
println(language.reversed())     // niltoK
  

4. String Comparison

val a = "Hello"
val b = "hello"

println(a == b)         // false (case-sensitive)
println(a.equals(b, ignoreCase = true))  // true
  

5. String Iteration

You can loop through each character in a string using a for loop:

val text = "Kotlin"

for (char in text) {
    print("$char ")
}
  

Output: K o t l i n

🧪 Try It Yourself

Use these quick challenges to practice:

• Create a multiline message with your name.
• Reverse your name using reversed().
• Check if two strings are equal ignoring case.