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charAt() : This method returns the character at the given index value of a string object.charCodeAt() : This method returns the Unicode value of the character at the given index.oncat() : This method combines two substrings and returns a superstring.indexOf() : This method returns the index of calling string having the first occurrence of a specified value, It will return -1 if not found.lastIndexOf() : This method returns the index of calling string having the last occurrence of a specified value, It will return -1 if not found.localeCompare() : This method returns a number representing whether a reference string comes before or after or is the same as given string in sort order.match() : This method is used to match a regular expression against a string.search() : This method executes a search for a match between the regular expressions in a specified string.slice() : Extract the section of a string object and returns a new string object.split() : Splits a string object into the array of strings by separating the string into substrings.substr() : This method returns the calling string beginning at the specified location through the specified number of characters.toLocaleLowerCase() : Converts the calling string into the lower case while respecting the current locale.toLocaleUpperCase() : Converts calling string into the upper case while respecting the current locale.toLowerCase() : Returns calling string in lower case.ToUpperCase() : Returns calling string in upper case.