Added password_strength_checker.py

Python/password_strength_checker.py

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+"""
+password_strength_checker.py
+
+Description:
+This program evaluates the strength of a given password based on:
+- Length
+- Presence of uppercase letters
+- Presence of lowercase letters
+- Presence of numbers
+- Presence of special characters
+
+It provides a strength rating (Weak, Moderate, Strong) and suggestions to improve weak passwords.
+"""
+
+import re
+
+def check_password_strength(password):
+    """Evaluates the strength of the password."""
+    strength_points = 0
+    suggestions = []
+
+    # Length check
+    if len(password) >= 8:
+        strength_points += 1
+    else:
+        suggestions.append("Use at least 8 characters.")
+
+    # Uppercase check
+    if re.search(r"[A-Z]", password):
+        strength_points += 1
+    else:
+        suggestions.append("Include at least one uppercase letter.")
+
+    # Lowercase check
+    if re.search(r"[a-z]", password):
+        strength_points += 1
+    else:
+        suggestions.append("Include at least one lowercase letter.")
+
+    # Digit check
+    if re.search(r"[0-9]", password):
+        strength_points += 1
+    else:
+        suggestions.append("Include at least one number.")
+
+    # Special character check
+    if re.search(r"[!@#$%^&*(),.?\":{}|<>]", password):
+        strength_points += 1
+    else:
+        suggestions.append("Include at least one special character (!@#$%^&* etc.).")
+
+    # Determine strength level
+    if strength_points <= 2:
+        strength = "Weak"
+    elif strength_points == 3 or strength_points == 4:
+        strength = "Moderate"
+    else:
+        strength = "Strong"
+
+    return strength, suggestions
+
+def main():
+    print("🔐 Password Strength Checker")
+    password = input("Enter your password: ")
+
+    strength, suggestions = check_password_strength(password)
+    print(f"\nPassword Strength: {strength}")
+
+    if suggestions:
+        print("Suggestions to improve your password:")
+        for s in suggestions:
+            print(f"- {s}")
+
+if __name__ == "__main__":
+    main()