Condition of 'if' expression is constant

Reports if expressions that have true or false constant literal condition and can be simplified.

While occasionally intended, this construction is confusing and often the result of a typo or previous refactoring.

Example:

  fun example() {
      if (true) {
          throw IllegalStateException("Unexpected state")
      }
  }

The quick-fix removes the if condition:

  fun example() {
      throw IllegalStateException("Unexpected state")
  }

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.

ConstantConditionIf

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 | Redundant constructs

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 ConstantConditionIf

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