Kotlin String

Strings are sequences of characters in Kotlin. In this tutorial, we'll discuss how to define strings, manipulate them, and perform various operations on them.

Syntax

To define a string in Kotlin, simply use double quotes. For example:

val greeting = "Hello, World!"

You can also use triple quotes to define a multi-line string. For example:

val message = """
    This is a multi-line
    string.
"""

Example

Let's say you have a string variable called "name" that contains the value "John". You can manipulate this string by using various string functions. For example:

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

This code will output "Hello, John!" to the console.

Output

The output of a Kotlin string depends on how the string is used and manipulated. For example, if you print the string to the console using the "println" function, the string will be displayed on a new line.

Explanation

Kotlin provides many functions to manipulate strings, including:

• length: Returns the length of the string.
• get(index: Int): Returns the character at a specified index.
• subSequence(startIndex: Int, endIndex: Int): Returns a subsequence of the string.
• contains(other: CharSequence): Returns true if the string contains the specified sequence of characters.
• replace(oldChar: Char, newChar: Char): Returns a new string with all occurrences of the specified character replaced by another character.

These functions and many more can be used to perform various operations on strings.

Use

Strings are used in Kotlin for a wide range of tasks, including:

• Displaying text to the user.
• Storing and processing data.
• Parsing input and output.

Important Points

• Strings are immutable in Kotlin, which means that once defined, their values cannot be changed.
• To concatenate strings, use the plus operator (+).
• When comparing strings, use the equals function (==), not the equality operator (===).

Summary

In this tutorial, we discussed how to define strings, manipulate them, and perform various operations on them in Kotlin. We covered the syntax, example, output, explanation, use, important points, and summary of Kotlin strings. With this knowledge, you can now use strings in your Kotlin projects effectively.