The reduce() method executes a reducer function on each element of the array and returns a single output value.
const message = ["JavaScript ", "is ", "fun."];
// function to join each string elements
function joinStrings(accumulator, currentValue) {
return accumulator + currentValue;
}
// reduce join each element of the string
let joinedString = message.reduce(joinStrings);
console.log(joinedString);
// Output: JavaScript is fun.