C# String Indexof?

What is string indexOf 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 string indexOf?

The indexOf() method returns the index within the calling String object of the first occurrence of the specified value, starting the search at fromIndex. Returns -1 if the value is not found.

How do I get LastIndexOf in C#?

The IndexOf() method returns the index number of the first matched character whereas the LastIndexOf() method returns index number of the last matched character.

  1. using System;
  2. public class StringExample.
  3. {
  4. public static void Main(string[] args)
  5. {
  6. string s1 = “Hello C#”;
  7. int first = s1.IndexOf(‘l’);

What is LastIndexOf in C# with example?

LastIndexOf() Method in C# LastIndexOf() method in C# is used to search for the specified object and returns the index of the last occurrence within the entire one-dimensional Array.

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Is indexOf case sensitive C#?

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

Can you index a string in C?

The index() function locates the first occurrence of c (converted to an unsigned char) in the string pointed to by string. The character c can be the NULL character (); the ending NULL is included in the search. The string argument to the function must contain a NULL character () marking the end of the string.

How do I use indexOf str?

Java String indexOf() Method Example

  1. public class IndexOfExample{
  2. public static void main(String args[]){
  3. String s1=”this is index of example”;
  4. //passing substring.
  5. int index1=s1.indexOf(“is”);//returns the index of is substring.
  6. int index2=s1.indexOf(“index”);//returns the index of index substring.

How does string indexOf work?

The indexOf() method returns the position of the first occurrence of specified character(s) in a string. Tip: Use the lastIndexOf method to return the position of the last occurrence of specified character(s) in a string.

Does indexOf work with objects?

indexOf() method returns the index of the first matching item in an array (or -1 if it doesn’t exist). var wizards = [‘Gandalf’, ‘Radagast’, ‘Saruman’, ‘Alatar’]; // Returns 1 wizards. indexOf(‘Radagast’); But… that doesn’t work if the array contains objects instead of simple strings or numbers.

What is the difference between indexOf and lastIndexOf in C#?

indexOf() method returns the position of the first occurrence of a specified value in a string. string. lastIndexOf() method returns the position of the last occurrence of a specified value in a string.

How do you find the last index of a string?

lastIndexOf() The lastIndexOf() method returns the index within the calling String object of the last occurrence of the specified value, searching backwards from fromIndex. Returns -1 if the value is not found.

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How do you find the length of a string in C#?

Strings

  1. String Length in C# Returns the number of characters in a string.
  2. Syntax. int length = stringName.Length;
  3. Notes. Spaces count as characters.
  4. Example. string name = “Anthony”; int nameLength = name.Length; Console.WriteLine(“The name ” + name + ” contains ” + nameLength + “letters.”);

How do I get the last index in C#?

GetUpperBound() Method is used to find the index of the last element of the specified dimension in the array. Syntax: public int GetUpperBound (int dimension);

How do I remove the last character of a string?

There are four ways to remove the last character from a string:

  1. Using StringBuffer. deleteCahrAt() Class.
  2. Using String. substring() Method.
  3. Using StringUtils. chop() Method.
  4. Using Regular Expression.

How do you find the last index of an array?

lastIndexOf() The lastIndexOf() method returns the last index at which a given element can be found in the array, or -1 if it is not present. The array is searched backwards, starting at fromIndex.

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