Count string occurrences in C#

To count the occurrences of a single character within a string in C#, you can use the Count method along with a lambda expression that compares each character in the string to the target character. Here is an example:

string str = "hello world";
char targetChar = 'o';

int count = str.Count(c => c == targetChar);

Console.WriteLine(count); // output: 2

To count the occurrences of multiple characters within a string, you can use a loop and the same approach as above. Here is an example:

string str = "hello world";
string targetChars = "lo";

int count = 0;
foreach (char c in str)
{
    if (targetChars.Contains(c))
    {
        count++;
    }
}

Console.WriteLine(count); // output: 5

In this example, the foreach loop iterates through each character in the string. If the character is one of the target characters specified in targetChars, the count is incremented.

C# count occurrences of substring in string:

string mainString = "Hello, Hello, World, Hello";
string substringToCount = "Hello";
int occurrences = mainString.Split(new[] { substringToCount }, StringSplitOptions.None).Length - 1;
// Result: 4

Count specific word occurrences in C# string:

string sentence = "This is a sentence with words. This sentence has words.";
string wordToCount = "sentence";
int occurrences = Regex.Matches(sentence, @"\b" + wordToCount + @"\b").Count;
// Result: 2

C# string count occurrences of character:

string inputString = "programming";
char charToCount = 'r';
int occurrences = inputString.Count(c => c == charToCount);
// Result: 2

How to find the number of occurrences of a substring in C#:

string mainString = "Hello, Hello, World, Hello";
string substringToCount = "Hello";
int occurrences = (mainString.Length - mainString.Replace(substringToCount, "").Length) / substringToCount.Length;
// Result: 4

C# count occurrences of a word in a sentence:

string sentence = "This is a sentence with words. This sentence has words.";
string wordToCount = "sentence";
int occurrences = sentence.Split(' ').Count(w => w.Equals(wordToCount, StringComparison.OrdinalIgnoreCase));
// Result: 2

LINQ count string occurrences in C#:

string mainString = "Hello, Hello, World, Hello";
string substringToCount = "Hello";
int occurrences = mainString.Split(new[] { substringToCount }, StringSplitOptions.None).Length - 1;
// Result: 4

Count occurrences of a specific character in a string C#:

string inputString = "programming";
char charToCount = 'r';
int occurrences = inputString.Count(c => c == charToCount);
// Result: 2

C# string manipulation count occurrences:

string mainString = "Hello, Hello, World, Hello";
string substringToCount = "Hello";
int occurrences = mainString.Split(new[] { substringToCount }, StringSplitOptions.None).Length - 1;
// Result: 4

Substring frequency count in C#:

string mainString = "Hello, Hello, World, Hello";
string substringToCount = "Hello";
int occurrences = Regex.Matches(mainString, Regex.Escape(substringToCount)).Count;
// Result: 4

Regex count string occurrences in C#:

string mainString = "Hello, Hello, World, Hello";
string substringToCount = "Hello";
int occurrences = Regex.Matches(mainString, Regex.Escape(substringToCount)).Count;
// Result: 4