##
### Overview
In this shot, we will learn about tuples in Julia.

In Julia, **tuples** are similar to arrays, but there are a few differences:
* Tuples are *immutable*; this means that we cannot alter the values of a tuple once they are assigned.
* Tuples track the type of each element. This means that they store the type of each value present in a tuple.
* Tuples are declared as comma-separated-values between parentheses `()`.

Similar to arrays, tuples also contain an ordered collection of items.


##   
### How to declare a tuple
The code below demonstrates how to declare a tuple.

#declare and initialize a tuple
t = (1000, "hello", "educative", 30.5)

println(t)

example

##    
### How to access an element of a tuple

We provide the index of an element between square brackets `[]` to access that element.
```
tuple[index_of_the_element]
```

>Note: Tuples also follow a `1-based` index, just like arrays in Julia.

Let's look at an example of how to access an element of a tuple in Julia.

In the following example, we want to access an element `educative`, which has an index of `3` in tuple `t`:

#declare and initialize a tuple
t = (1000, "hello", "educative", 30.5)

#accessing element at index 3
println(t[3])

If we try to alter a value in the tuple, the interpreter will throw an error:

#declare and initialize a tuple
t = (1000, "hello", "educative", 30.5)

#trying to change value from "hello" to "hi"
t[2] = "hi"

We get the `ERROR: LoadError: MethodError: no method matching setindex!` error since tuples are immutable.

What are tuples in Julia?

Overview

How to declare a tuple

How to access an element of a tuple