String concatenation that can be converted to string template

Reports string concatenation that can be converted to a string template.

Using string templates is recommended as it makes code easier to read.

Example:

  fun example() {
      val capitals = mapOf("France" to "Paris", "Spain" to "Madrid")
      for ((country, capital) in capitals) {
          print(capital + " is a capital of " + country)
      }
  }

After the quick-fix is applied:

  fun example() {
      val capitals = mapOf("France" to "Paris", "Spain" to "Madrid")
      for ((country, capital) in capitals) {
          print("$capital is a capital of $country")
      }
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

ConvertToStringTemplate

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Kotlin | Style issues

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection ConvertToStringTemplate

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025