C# (C Sharp) Arrays 배열 사용법

If you are familiar with C#, you might have seen arrays created with the new keyword, and perhaps you have seen arrays with a specified size as well. In C#, there are different ways to create an array:

// Create an array of four elements, and add values later
string[] cars = new string[4];

// Create an array of four elements and add values right away 
string[] cars = new string[4] {"Volvo", "BMW", "Ford", "Mazda"};

// Create an array of four elements without specifying the size 
string[] cars = new string[] {"Volvo", "BMW", "Ford", "Mazda"};

// Create an array of four elements, omitting the new keyword, and without specifying the size
string[] cars = {"Volvo", "BMW", "Ford", "Mazda"};

 

It is up to you which option you choose. In our tutorial, we will often use the last option, as it is faster and easier to read.
However, you should note that if you declare an array and initialize it later, you have to use the new keyword:

// Declare an array
string[] cars;

// Add values, using new
cars = new string[] {"Volvo", "BMW", "Ford"};

// Add values without using new (this will cause an error)
cars = {"Volvo", "BMW", "Ford"};	// 불가능!

즉, 배열 변수를 선언하면서 바로 값을 대입할 때를 제외하고 'new'는 생략 할 수 없다.

배열의 공간 크기는 선은을 해도 되고, 생략해도 된다.

왠만하면 그냥 'new'는 항상 쓰는 습관을 갖자...

 

 

Reference : C# Arrays (w3schools.com)

C# Arrays