To get character at specific index of String in Kotlin, use String. get() method . Given a string str1 , and if we would like to get the character at index index in the string str1 , call get() method on string str1 and pass the index index as argument to the method as shown below.
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Check whether a string contains a substring in Kotlin
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substring(startIndex: Int ) : String. This method will return one substring starting from index startIndex to the end of the string.
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The Java String contains() method is used to check whether the specific set of characters are part of the given string or not. It returns a boolean value true if the specified characters are substring of a given string and returns false otherwise. It can be directly used inside the if statement.
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Kotlin Program to Check if An Array Contains a Given Value
Read moreHow do I find a character in string Kotlin?
Example: Find Frequency of Character In the above program, the length of the given string, str , is found using the string method length() . We loop through each character in the string using charAt() function which takes the index ( i ) and returns the character in the given index .
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