Frequency of character in string

Using Dictionary:

string input = "Mahindra Thar Armada";
Dictionary charFrequency = new Dictionary();

foreach (char c in input)
{
    if (charFrequency.ContainsKey(c))
    {
        charFrequency[c]++;
    }
    else
    {
        charFrequency[c] = 1;
    }
}

// Print the character frequencies
foreach (var pair in charFrequency)
{
    Console.WriteLine($"{pair.Key} - {pair.Value}");
}

Using Linq Query:

var charFrequency = input
    .GroupBy(c => c)
    .ToDictionary(g => g.Key, g => g.Count());

// Print the character frequencies
foreach (var pair in charFrequency)
{
    Console.WriteLine($"{pair.Key} - {pair.Value}");
}

Using JavaScript

const frequencyOfChar = (arr) => {
    return arr.reduce((total, letter) => {
        total[letter] ? total[letter]++ : (total[letter] = 1);
        return total;
    }, {});
};


let input="Mahindra Thar Armada";
let arr=[...input];
const result = frequencyOfChar(arr);
console.log(result); // {"M": 1,"a": 5,"h": 2, "i": 1, "n": 1, "d": 2, "r": 3, " ": 2, "T": 1, "A": 1, "m": 1 }

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