Method isPangram

src/main/java/com/thealgorithms/strings/Pangram.java:46–60

Checks if a String is considered a Pangram @param s The String to check @return true if s is a Pangram, otherwise false

(String s)

     * @return {@code true} if s is a Pangram, otherwise {@code false}
     */
    public static boolean isPangram(String s) {
        boolean[] lettersExisting = new boolean[26];
        for (char c : s.toCharArray()) {
            int letterIndex = c - (Character.isUpperCase(c) ? 'A' : 'a');
            if (letterIndex >= 0 && letterIndex < lettersExisting.length) {
                lettersExisting[letterIndex] = true;
            }
        }
        for (boolean letterFlag : lettersExisting) {
            if (!letterFlag) {
                return false;
            }
        }
        return true;
    }

    /**
     * Checks if a String is Pangram or not by checking if each alphabet is present or not