Leetcode - 1832. Check if the Sentence Is Pangram

Leetcode - 1832. Check if the Sentence Is Pangram

• A pangram is a sentence where every letter of the English alphabet appears at least once.

  Given a string sentence containing only lowercase English letters, return true if sentence is a pangram, or false otherwise.

Solution

func checkIfPangram(sentence string) bool {
    charMap := make(map[rune]bool)

	for _, char := range strings.ToLower(sentence){
		if unicode.IsLetter(char){
			charMap[char]=true
		}
	}
	return len(charMap)==26
}