Add pangram checker logic building problem

This module includes a function to check if a string is a pangram, with examples provided in the docstring.

Author: Tejasrahane

logic_building_problems/pangram.py

@@ -0,0 +1,46 @@
+"""Pangram Checker.
+
+This module contains functions to check if a string is a pangram.
+A pangram is a sentence that contains every letter of the alphabet at least once.
+"""
+
+import string
+
+
+def is_pangram(text: str) -> bool:
+    """
+    Check if a given string is a pangram.
+
+    A pangram is a string that contains every letter of the alphabet
+    at least once, ignoring case and non-alphabetic characters.
+
+    Args:
+        text: The string to check
+
+    Returns:
+        True if the string is a pangram, False otherwise
+
+    Examples:
+        >>> is_pangram("The quick brown fox jumps over the lazy dog")
+        True
+        >>> is_pangram("Hello World")
+        False
+        >>> is_pangram("Pack my box with five dozen liquor jugs")
+        True
+        >>> is_pangram("abcdefghijklmnopqrstuvwxyz")
+        True
+        >>> is_pangram("")
+        False
+        >>> is_pangram("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
+        True
+    """
+    # Convert text to lowercase and get all unique letters
+    letters = set(char.lower() for char in text if char.isalpha())
+    # Check if all 26 letters of the alphabet are present
+    return len(letters) == 26
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()