Kotlin Program to Convert Character to String and Vice-Versa

In Kotlin, converting characters to strings and vice versa is a common task that can be accomplished in several ways. This article explores three different Kotlin Program to Convert Character to String and Vice-Versa providing detailed explanations, code implementations, and outputs for each example.

1. Converting Character to String

1.1 Using toString Method

Program Explanation

The toString method is a straightforward way to convert a character to a string in Kotlin. This method is available on any Kotlin Char and converts it directly to a String.

Code Implementation

fun main() {
    val char = 'A'

    // Convert character to string using toString() method
    val string = char.toString()

    println("Character: $char")
    println("Converted String: $string")
}

Output

Character: A
Converted String: A

1.2 Using String Interpolation

Program Explanation

String interpolation in Kotlin can also be used to convert a character to a string. By embedding the character in a string template, Kotlin automatically converts the character to a string.

Code Implementation

fun main() {
    val char = 'B'

    // Convert character to string using string interpolation
    val string = "$char"

    println("Character: $char")
    println("Converted String: $string")
}

Output

Character: B
Converted String: B

1.3 Using String Constructor

Program Explanation

The String constructor can be used to create a string from a character by passing the character as an argument to the constructor.

Code Implementation

fun main() {
    val char = 'C'

    // Convert character to string using String constructor
    val string = String(charArrayOf(char))

    println("Character: $char")
    println("Converted String: $string")
}

Output

Character: C
Converted String: C

2. Converting String to Character

2.1 Using get Method

Program Explanation

The get method (or the [] operator) can be used to retrieve a character at a specific index from a string. When converting a single-character string to a character, you can access the first character using string[0].

Code Implementation

fun main() {
    val string = "D"

    // Convert string to character using get method
    val char = string[0]

    println("String: $string")
    println("Converted Character: $char")
}

Output

String: D
Converted Character: D

2.2 Using single Method

Program Explanation

The single method ensures that the string contains exactly one character and returns that character. This method is useful for validating that the conversion is possible without errors.

Code Implementation

fun main() {
    val string = "E"

    // Convert string to character using single method
    val char = string.single()

    println("String: $string")
    println("Converted Character: $char")
}

Output

String: E
Converted Character: E

2.3 Using first Method

Program Explanation

The first method returns the first character of a string. This method can be used when you are sure that the string is non-empty and want to convert its first character.

Code Implementation

fun main() {
    val string = "F"

    // Convert string to character using first method
    val char = string.first()

    println("String: $string")
    println("Converted Character: $char")
}

Output

String: F
Converted Character: F

Conclusion

In this article, we explored various methods to convert characters to strings and vice versa in Kotlin. The first set of examples demonstrated how to convert characters to strings using the toString method, string interpolation, and the String constructor. The second set of examples showed how to convert strings to characters using the get method, the single method, and the first method.

Each method offers different advantages, and understanding these techniques allows you to handle character and string conversions efficiently in your Kotlin programs.