C# | Finding the index of last element in the array
Last Updated :
01 Feb, 2019
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GetUpperBound() Method is used to find the index of the last element of the specified dimension in the array.
Syntax:
CSharp
CSharp
public int GetUpperBound (int dimension);Here, dimension is a zero-based dimension of the array whose upper bound needs to be determined. Return Value:The return type of this method is System.Int32. This method returns the index of the last element of the specified dimension in the array Or -1 if the specified dimension is empty. Exception: This method will give IndexOutOfRangeException if the value of dimension is less than zero, or equal or greater than Rank. Note: GetUpperBound(0) returns the last index in the first dimension of the array, and GetUpperBound(Rank - 1) returns the last index of the last dimension of the array. This method is an O(1) operation. Below programs illustrate the use of GetUpperBound() Method: Example 1:
// C# program to illustrate the GetUpperBound(Int32)
// method in 1-D array
using System;
public class GFG {
// Main method
static public void Main()
{
// 1-D Array
int[] value = {1, 2, 3, 4, 5, 6, 7};
// Get the index of the last element
// in the given Array by using
// GetUpperBound(Int32) method
int myvalue = value.GetUpperBound(0);
Console.WriteLine("Index: {0}", myvalue);
}
}
Output:
Example 2:
Index: 6
// C# program to find last index
// value and rank of 2-D array
using System;
public class GFG {
// Main method
static public void Main()
{
// 2-D char Array
char[, ] value = { { 'a', 'b' }, { 'c', 'd' },
{ 'e', 'f' }, { 'g', 'h' },
{ 'i', 'j' } };
// Get the index of the last element
// and the rank of the given Array
int myvalue = value.GetUpperBound(0);
Console.WriteLine("Dimension: {0}", value.Rank);
Console.WriteLine("Index: {0}", myvalue);
}
}
Output:
Reference: https://docs.microsoft.com/en-us/dotnet/api/system.array.getupperbound?view=netcore-2.1
Dimension: 2 Index: 4
