How do you get an index of an element in a list C#?

To get the index of an item in a single line, use the FindIndex() and Contains() method. int index = myList. FindIndex(a => a.

Can you index a list in C#?

The IndexOf method returns the first index of an item if found in the List. C# List class provides methods and properties to create a list of objects (classes). The IndexOf method returns the first index of an item if found in the List.

Are C# lists 0 indexed?

They are 0 based. Count will start with one however if the list has any items in it. From MSDN if you cared to look it up: Elements in this collection can be accessed using an integer index.

What is index of in C#?

In C#, IndexOf() method is a string method. This method is used to find the zero based index of the first occurrence of a specified character or string within current instance of the string. The method returns -1 if the character or string is not found.

What is an index C#?

Index type in C# is a number that can be used for indexing. Index counts a collection items from the beginning. To count a collection items from the end, a prefix (^) operator can be used with an Index.

What does list index do?

The list index() Python method returns the index number at which a particular element appears in a list. index() will return the first index position at which the item appears if there are multiple instances of the item.

How do you find the index of an element in a Numpy array?

Get the first index of an element in numpy array

  1. result = np. where(arr == 15)
  2. if len(result) > 0 and len(result[0]) > 0:
  3. print(‘First Index of element with value 15 is ‘, result[0][0])

Is IndexOf case sensitive C#?

If the string was not found, IndexOf() returns -1. There’s no case insensitive version.

How do I traverse a list in C#?

Iterate Through a List With the foreach Loop in C. The foreach loop iterates through a data structure in C#. The foreach loop is used as an iterator because it repeats a code block for each element inside the data structure. We can also use the foreach loop to iterate through a list.