This tutorial will discuss the procedure to find a substring in a Scala string. A string is a sequence of characters and an array of chars. Scala provides a class, i.e., String, to handle the chars and their operations such as creating, finding, removing, etc. This article will find the substring in a string by using some built-in functions and running examples. Use the contains() Function to Find Substring in Scala Here, we used the contains() function to find the substring in a string.