if (isPangram("The quick brown fox jumps over the lazy dog")) {
    console.log("This is a pangram");
} else {
    console.log("This is not a pangram");
}


// ChatGPT
// Function that checks if the provided sentence is Pangram or not
function isPangram(sentence) {
  // Convert the sentence to lowercase and remove any punctuation
  let str = sentence.toLowerCase().replace(/[^a-z]/g, "");

  // Create an array of all unique characters
  let uniqueChars = [...new Set(str)];

  // Check if the number of unique characters is 26 (the number of letters in the alphabet)
  return uniqueChars.length === 26 ? true : false;
}



// ChatGPT
// Using FOR loops
function isPangram_2(sentence) {
    // Create an empty object to store the letter's frequency
    var letterFrequency = {};
    // loop through each character of the sentence
    for (var i = 0; i < sentence.length; i++) {
        // convert the current character to lowercase
        var letter = sentence[i].toLowerCase();
        // check if the current character is a letter
        if (letter.match(/[a-z]/i)) {
            // if the current character is already in the object, increment the count
            if (letterFrequency[letter]) {
                letterFrequency[letter]++;
            } else {
                // if not, add the current character to the object with a count of 1
                letterFrequency[letter] = 1;
            }
        }
    }
    // check if all the letters of the alphabet are in the object
    for (var i = 'a'.charCodeAt(); i <= 'z'.charCodeAt(); i++) {
        if (!letterFrequency[String.fromCharCode(i)]) {
            return false; // if any letter is missing, return false
        }
    }
    return true; // if all the letters are in the object, return true
}