kotlin-stdlib / kotlin / isFinite isFinite Common JVM JS Native 1.0 fun Double . isFinite ( ) : Boolean (Common source) (JVM source) (JS source) (Native source) fun Float . isFinite ( ) : Boolean (Common source) (JVM source) (JS source) (Native source) Returns true if the argument is a finite floating-point value; returns false otherwise (for NaN and infinity arguments).