C# | Finding the index of first element in the array
Last Updated :
01 Feb, 2019
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GetLowerBound() Method is used to find the index of the first element of the specified dimension in the array.
Syntax:
public int GetLowerBound (int dimension);
Here, dimension is a zero-based dimension of the array whose lower bound needs to be determined.
Return Value: The return type of this method is System.Int32. This method returns the index of the first element of the specified dimension in the array.
Exception: This method will give IndexOutOfRangeException if the value of dimension is less than zero, or equal or greater than Rank.
Note:
- GetLowerBound(0) returns the starting index of the first dimension of the array, and GetLowerBound(Rank – 1) returns the starting index of the last dimension of the array.
- The GetLowerBound method always returns a value that indicates the index of the lower bound of the array, even if the array is empty.
- This method is an O(1) operation.
Below programs illustrate the use of GetLowerBound() Method:
Example 1:
// C# program to illustrate the GetLowerBound(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 first element // in the given Array by using // GetLowerBound(Int32) method int myvalue = value.GetLowerBound(0); Console.WriteLine("Index: {0}", myvalue); } } |
Output:
Index: 0
Example 2:
// C# program to illustrate the GetLowerBound(Int32) // method when the array is empty using System; public class GFG { // Main method static public void Main() { // Empty 1-D Array int[] value = {}; // Get the index of the first element // in the given Array by using // GetLowerBound(Int32) method int myvalue = value.GetLowerBound(0); Console.WriteLine("Index: {0}", myvalue); } } |
Output:
Index: 0
