Create count_consonants.py

Author: its-100rabh

strings/count_consonants.py

@@ -0,0 +1,34 @@
+def count_consonants(s: str) -> int:
+    """
+    Count the number of consonants in a given string.
+
+    :param s: Input string to count consonants in.
+    :return: Number of consonants in the input string.
+
+    Examples:
+    >>> count_consonants("hello world")
+    7
+    >>> count_consonants("HELLO WORLD")
+    7
+    >>> count_consonants("123 hello world")
+    7
+    >>> count_consonants("")
+    0
+    >>> count_consonants("a quick brown fox")
+    10
+    >>> count_consonants("the quick BROWN fox")
+    13
+    >>> count_consonants("PYTHON")
+    5
+    """
+    if not isinstance(s, str):
+        raise ValueError("Input must be a string")
+
+    consonants = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
+    return sum(1 for char in s if char in consonants)
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()