In Haskell, there are several ways to find the first element of an array.
One way is to use the head function, which returns the first element of a list. Since arrays are a type of list in Haskell, the head function can also be used to find the first element of an array.
Here is an example:
myArray = [1, 2, 3, 4, 5]
firstElement = head myArray
In this example, myArray is an array of integers, and firstElement is the first element of the array, which is 1.
Another way to find the first element of an array is to use pattern matching. This involves defining a function that takes an array as an argument and matches the array to a pattern that extracts the first element.
Here is an example:
findFirstElement :: [Int] -> Int
findFirstElement (x:xs) = x
In this example, the function findFirstElement takes an array of integers as an argument and matches it to a pattern with two parts: x, which is the first element of the array, and xs, which is the rest of the array. The function returns x, which is the first element of the array.
To use this function, you would call it with an array as an argument, like this:
myArray = [1, 2, 3, 4, 5]
firstElement = findFirstElement myArray
In this example, myArray is the array of integers from before, and firstElement is the first element of the array, which is still 1.