C# | Finding the index of first element in the array

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: Example 2:

Reference: https://learn.microsoft.com/en-us/dotnet/api/system.array.getlowerbound?view=netcore-2.1