Java Easy Solution
\nclass Solution {\n    public boolean checkIfPangram(String sentence) {\n        Set<Character> set = new HashSet<Character>();\n        int length = sentence.
```\nclass Solution {\n    public boolean checkIfPangram(String sentence) {\n        Set<Character> set = new HashSet<Character>();\n        int length = sentence.length();\n        for (int i = 0; i < length; i++) {\n            char c = sentence.charAt(i);\n            if (c >= \'a\' && c <= \'z\')\n                set.add(c);\n        }\n        return set.size() == 26;\n    }\n}\n```
['Java']