The output is [2, 3, 4, 5, 6]. This code demonstrates a practical use of function currying with array methods. The curried `add` function takes one argument and returns a function that takes a second argument. We use it to create a specialized `increment` function by partially applying it with the value 1. When this `increment` function is passed to `Array.map()`, it's called for each element in the array, adding 1 to each number. This showcases how currying can create utility functions that are easily reusable and composable with array operations.