Kotlin String Concatenation

Kotlin String Concatenation

To concatenate strings in Kotlin, you can use concatenation operator +. You may usually encounter concatenation operator as addition operator.

Since strings are very commonly used datatypes in business logic, sometimes, you may need to concatenate two or more strings.

In this tutorial, we will learn how to concatenate strings in Kotlin programming language.

Syntax

The syntax to concatenate two strings is given below.

string_1 + string_2

The operator + concatenates the two operands string1 and string2 and returns the resulting string. You may store the result in a variable.

Concatenation Operator allows chaining. This results in an easy way where you can concatenate two or more strings in a single statement as shown in the following.

string_1 + string_2 + string_3 + ... + stringN

Examples

1. Concatenate strings using String Concatenation Operator

In this example, we shall take two strings string1 and string2 ,and concatenate them using String Concatenation Operator.

Kotlin Program

/**
 * Kotlin - String Concatenation
 */
fun main(args: Array<String>) {
    //a string
    var string1 = "https://"
    //another string
    var string2 = "www.tutorialkart.com"
    //concatenate strings
    var stringResult = string1 + string2

    print(stringResult)
}

Output

https://www.tutorialkart.com

The original strings are unaffected by this concatenation operation.

2. Concatenate more than two strings

You can concatenate more than two strings in a single statement.

In this example, we shall take three strings and perform string concatenation on them. The process should be same for any number of string you would like concatenate.

Kotlin Program

/**
 * Kotlin - String Concatenation
 */
fun main(args: Array<String>) {
    //a string
    var string1 = "https://"
    //another string
    var string2 = "www.tutorialkart.com"
    //yet another string
    var string3 = "/kotlin-tutorial/"
    //concatenate strings
    var stringResult = string1 + string2 + string3

    print(stringResult)
}

Output

https://www.tutorialkart.com/kotlin-tutorial/

The order in which the strings are concatenated is determined by the order in which we provide the operands to the concatenation operator.

Conclusion

In this Kotlin Tutorial, we learned how to concatenate strings in Kotlin using String concatenation operator.