Kotlin-stdlib

Returns a substring of this string that starts at the specified startIndex and continues to the end of the string . Returns the substring of this string starting at the startIndex and ending right before the endIndex.

To check if a string contains specified string in Kotlin, use String. contains() method . Given a string str1 , and if we would like to check if the string str2 is present in the string str1 , call contains() method on string str1 and pass the the string str2 as argument to the method as shown below.

ignoreCase – true to ignore character case when comparing strings. By default false . Returns true if this character is equal to the other character, optionally ignoring character case. Two characters are considered equal ignoring case if Char.

contains(element: T)’ to get the same search behavior as in a list . Returns true if element is found in the array. Returns true if element is found in the collection. Checks if the map contains the given key.

Check whether a string contains a substring in Kotlin

toLowerCase() One of the easiest ways to check if a String has a substring without considering the case is to convert all the Strings to lowercase and then check for a substring . To check for a substring, we use the contains() method, and for converting the String to lowercase, we use the toLowerCase() method.