In this example we allocate an array with length of 6 elements of type int. In C# we create an array with the help of the keyword new, which is used to allocate memory: In the program’s execution stack the variable with the name myArray is created and its value is set to null (meaning it holds no value).Ĭreation of an Array – the Operator 'new' The figure below shows how a declared array variable looks, when the memory for elements of the array is not allocated yet: This is because the memory for the elements is not allocated yet.

When we declare an array type variable, it is a reference, which does not have a value (it points to null ). With we indicate, that the variable, which we are declaring, is an array of elements, not a single element. This means that we declared an array of integer numbers. In this example the variable myArray is the name of the array, which is of integer type ( int ). We declare an array in C# in the following way: Once the length of an array is set we cannot change it anymore. In C# the arrays have fixed length, which is set at the time of their instantiation and determines the total number of elements. One-dimensional arrays are also called vectors and two-dimensional are also known as matrices.ĭeclaration and Allocation of Memory for Arrays

This allows us to represent a group of similar elements as an ordered sequence and work on them as a whole.Īrrays can be in different dimensions, but the most used are the one-dimensional and the two-dimensional arrays. The total number of elements in a given array we call length of an array.Īll elements of a given array are of the same type, no matter whether they are primitive or reference types. They are collections of variables, which we call elements:Īn array’s elements in C# are numbered with 0, 1, 2, … N-1. Arrays are vital for most programming languages.

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