Added Ceaser Cipher Algorithm

ceaser_cipher.py

@@ -0,0 +1,29 @@
+
+def ceaser_cipher(text: str, s: int) -> str:
+    """ Returns the input text in encrypted form
+
+    >>> ceaser_cipher(Hello!@2world, 3)
+    Returns -> Khoor!@2zruog
+
+    """
+    result = ""
+
+    for i in range(len(text)):  # Traverse the text
+        char = text[i]
+
+         # Encrypt According to the case
+        if (char.isupper()):
+            result += chr((ord(char) + s-65) % 26 + 65)
+
+        elif (char.islower()):
+            result += chr((ord(char) + s - 97) % 26 + 97)
+
+        else: # Do not encrypt non alpha characters
+            result += char
+
+    return result
+
+if __name__ == "__main__":
+    txt = input("Enter text to Encrypt: ")
+    key = int(input("Enter Your Key: "))
+    print("Encrypted Text:", ceaser_cipher(txt, key))