How to do it...

In the following steps, we will learn how to use String templates:

1. In Kotlin, the template expression starts with a $ sign.
2. The syntax of string templates is as follows:

$variableName

Alternatively, it is this:

${expression}

1. Let's check out a few examples:

• Consider the example of a String template with variable:

fun main(args: Array<String>) {
    val foo = 5;
    val myString = "foo = $foo"
    println(myString)
 }

The output of the preceding code will be foo = 5.

• Consider the example of a String template with expression:

fun main(arr: Array<String>){
  val lang = "Kotlin"
  val str = "The word Kotlin has ${lang.length} characters."
  println(str)
}

• Consider the example of a String template with raw string:
  • Raw string: A string consisting of newlines without writing \n and arbitrary string. It's a raw string and is placed in triple quotes ("""):

fun main(args: Array<String>) {
    val a = 5
    val b = 6
 
    val myString = """
    ${if (a > b) a else b}
 """
    println("Bigger number is: ${myString.trimMargin()}")
 }

When you run the program, the output will be Bigger number is: 6.