Check if the Sentence Is Pangram - Solution & Explanation

This approach leverages a set data structure to track the unique characters. The idea is to iterate through the sentence and add each letter to a set. Finally, we check if the size of the set is 26, which indicates that all letters of the alphabet are present.

This solution uses a boolean array of size 26 to represent each letter of the alphabet. As we iterate through the input sentence, we mark the respective index in the array to true. Finally, we check if all elements in the array are true to verify if the sentence is a pangram.

This method uses a boolean array of size 26 to directly map each alphabet character to an index. By iterating over each character in the sentence, we update its corresponding index in the array to true. The sentence is confirmed as a pangram if all indices in the boolean array are true.

This approach relies on a 26-element boolean array, where each index corresponds to a letter of the alphabet (0 for 'a', 1 for 'b', etc.). As we parse the sentence, each letter sets its spot to true. A final loop checks that all positions in the array are true, affirming the pangram status.