1832. Check if the Sentence Is Pangram

Easy
​
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.
Example 1:
Input: sentence = "thequickbrownfoxjumpsoverthelazydog"
Output:
true
Explanation:
sentence contains at least one of every letter of the English alphabet.
Example 2:
Input: sentence = "leetcode"
Output:
false
Constraints:
  • 1 <= sentence.length <= 1000
  • sentence consists of lowercase English letters.

解題

func checkIfPangram(sentence string) bool {
alphabet := [26]bool{false}
for _, val := range(sentence) {
alphabet[val-97] = true
}
for _, val := range(alphabet) {
if !val { return false }
}
​
return true
}