The join() method in TypeScript is used to join the elements of an array as a string.
array.join(separator)
separator: This is a character or string that separates each element of the array when joined as a string.
This method returns the combination of all the elements of the array as a single string.
// create arrays in TypeScriptlet names: string[] = ["Theodore", "James", "Peter", "Amaka"]let numbers : Array<number>;numbers = [12, 34, 5, 0.9]let cars : Array<string> = ["Porsche", "Toyota", "Lexus"]// print elements of the arrays as a stringconsole.log(names.join(" ")) // separated by spaceconsole.log(numbers.join("+")) // separated by "+"console.log(cars.join("/")) // separated by "/"
names, numbers, and cars and initialize them with elements.join() method to combine the elements of names using the separator, " ", and print the returned string to the console.join() method to combine the elements of numbers using the separator, "+", and print the returned string to the console.join() method to combine the elements of cars using the separator, "/", and print the returned string to the console.