# Definition

Let's see why we need to use arrays in C# 😁

# What are arrays?

Arrays are actually objects 🤔.

# Why using arays?

You can use arrays to store same-type variables.

# Example

Imagine you have 3 numbers and you want to calculate their sum. Well, we could declare these numbers as individual variables and then create another one to hold the sum:

var nr1 = 3;
var nr2 = 5;
var nr3 = 4;

var sum = nr1 + nr2 + nr3;
Console.WriteLine(sum);

This works well, but what happens if we have 10 numbers? What about something crazy like 75268 numbers? Imagine how many variables you need to write! 😲

Giphy

This is where arrays kick in. Let's rewrite the program with an array instead:

var numbers = new[] { 3, 5, 4 };

var sum = numbers.Sum();
Console.WriteLine(sum);

# Conclusion

Awesome! And now, we don't have to worry about declaring those 75265 numbers as individual variables anymore. 😌