Scala String indexOf(String str) method with example Last Updated : 03 Oct, 2019 Improve Improve Like Article Like Save Share Report The indexOf(String str) method is utilized to return the index of the sub-string which occurs first in the string stated. Method Definition: indexOf(String str) Return Type: It returns the index of the sub-string which is specified in the argument of the method. Example #1: // Scala program of int indexOf() // method // Creating object object GfG { // Main method def main(args:Array[String]) { // Applying indexOf method val result = "NidhiSingh".indexOf("dh") // Displays output println(result) } } Output: 2 Example #2: // Scala program of int indexOf() // method // Creating object object GfG { // Main method def main(args:Array[String]) { // Applying indexOf method val result = "NidhiSingh".indexOf("Sin") // Displays output println(result) } } Output: 5 Like Article Suggest improvement Next Scala String lastIndexOf(String str) method with example Share your thoughts in the comments Add Your Comment Please Login to comment...