Introduction: An Array is mutable
collection type in F#. The element of array are defined inside square bracket
with vertical bar after opening bracket and before closing bracket and array
element is separate by semicolon.
Defining Array:
let array_name =
[|element1;element2;element3|;.....elementn]
Like,
let
array1 =[|1;2;3;4;5|]
We can also declare array using
sequence expressions.
Like below code
let
array1 =[|for i in
1 .. 5 -> i|]
Accesing Array Element
An Array element is
retrieved by a square bracket with the dot(.) operator. The index of the desired element
is written inside the square bracket. We write the following code:
let
array1 =[|1;2;3;4;5|]
printfn
"%i" array1.[0]
printfn "%i" array1.[1]
printfn "%i" array1.[2]
printfn "%i" array1.[3]
printfn "%i" array1.[4]
We run this code by pressing the Ctrl+F5 key. The output will look like below:
![array in F#]()
Now we write following code
for accessing array elements:
let array1 =[|"aaa";"bbb";"ccc";"ddd";"eee"|]
printfn "%A" array1
Now,
The output will look like below:
![array in F#]()
Assigning an Array Element
An Array element is assigned to a array with the <- operator. Like below:
array1.[0] <-
"aaa";
array1.[1] <- "bbb";
array1.[2] <- "ccc";
Array Slicing
There is a special symbol for taking slice of an array. We specify the upper and
lower bound for accessing a subset of an array element. Like the following code:
let
array1 =[|"aaa";"bbb";"ccc";"ddd";"eee"|]
printfn "%A" array1.[2..3]
When we run this code, the
output will be below:
![array in F#]()