Using sort method:
In this example, the sort method takes a comparison function as its argument. The comparison function takes two arguments a and b, which represent two elements of the array being compared. The function returns the difference between the length of b and the length of a, which sorts the array in descending order based on the length of each string. After sorting the array, the first element in the sorted array is the longest string, which is stored in the longestString variable.
Using reduce method:
In this example, the reduce method takes a callback function as its argument. The callback function takes two arguments a and b, which represent the accumulated value and the current value, respectively. The function returns the longer string between a and b by using a ternary operator. After iterating over the entire array, the reduce method returns the longest string found, which is stored in the longestString variable.