In this article I will explain about the Arrays
and length property of array in Visual Basic.
Array - An array is a data structure
that contains a number of variables of the same type. Arrays are declared with a
type. There are different ways of declaring arrays. Arrays are declared much
like variables, with a set of [] brackets after the data type, like this.
string[] names;
You need to instantiate the array to use it, which is done like this:
string[] names = new string[2];
The number (2) is the size of the array, that is, the amount of items we can put
in it. Putting items into the array is pretty simple as well:
names[0] = "Rohatash";
Array Length
Array length represents the total number of
elements in all the dimensions of the Array.
Basic array length
Dim
arrayA As Integer()
= New Integer(7)
{}
Dim
lengthA As Integer
= arrayA.Length
Console.WriteLine("Basic
array length =" & lengthA)
Long array length
Dim
longLength As Long
= arrayA.LongLength
Console.WriteLine("Long
array length =" & longLength)
Zero length array
Dim
zero As Integer()
= New Integer(-1)
{}
Dim
lengthZero As Integer
= zero.Length
Console.WriteLine("zero length array ="
& lengthZero)
Two-dimensional Length example
Dim
two As Integer(,)
= New Integer(5,
9) {}
Console.WriteLine("First-dimensional
GetLength array=" & two.GetLength(0))
Console.WriteLine("Second-dimensional
GetLength array=" & two.GetLength(1))
Example
This example defines Basic array length, Long array length, Zero
length array, Two-dimensional Length example.
VB code
Module Module1
Sub Main()
Dim arrayA As Integer() = New Integer(7) {}
Dim lengthA As Integer = arrayA.Length
Console.WriteLine("Basic
array length =" & lengthA)
' Long array length example.
Dim longLength As Long = arrayA.LongLength
Console.WriteLine("Long
array length =" & longLength)
' Zero length array example.
Dim zero As Integer() = New Integer(-1) {}
Dim lengthZero As Integer = zero.Length
Console.WriteLine("zero
length array =" & lengthZero)
' Two-dimensional GetLength example.
Dim two As Integer(,) = New Integer(5, 9) {}
Console.WriteLine("First-dimensional
GetLength array=" & two.GetLength(0))
Console.WriteLine("Second-dimensional
GetLength array=" & two.GetLength(1))
End Sub
End Module
OUTPUT
C# code
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
namespace
array_length
{
class Program
{
static void
Main(string[] args)
{
int[] arrayA = new int[8];
int lengthA = arrayA.Length;
Console.WriteLine("Basic
array length =" +lengthA);
// Long array length example.
long longLength = arrayA.LongLength;
Console.WriteLine("Long
array length =" + longLength);
//
Zero length array example.
int[] zero = new int[0];
int lengthZero = zero.Length;
Console.WriteLine("zero
length array =" + lengthZero);
// Two-dimensional GetLength example.
int[,] two = new int[6, 10];
Console.WriteLine("First-dimensional
GetLength array=" +two.GetLength(0));
Console.WriteLine("Second-dimensional
GetLength array=" +two.GetLength(1));
}
}
}