Scala String indexOf(String str) method with example 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 Last Updated : 03 Oct, 2019 Like Article Save Article Previous Scala String replaceAll() method with example Next Scala String indexOf(String str, int fromIndex) method with example Share your thoughts in the comments Add Your Comment Please Login to comment...