principle of caesar cipher

caesar_cipher.py

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+# A python program to illustrate Caesar Cipher Technique
+def encrypt(text, s):
+    result = ""
+
+    # traverse text
+    for i in range(len(text)):
+        char = text[i]
+
+        # Encrypt uppercase characters
+        if (char.isupper()):
+            result += chr((ord(char) + s - 65) % 26 + 65)
+
+        # Encrypt lowercase characters
+        else:
+            result += chr((ord(char) + s - 97) % 26 + 97)
+
+    return result
+
+# Modify this s variable to change shifted secret message
+s = 4
+text = input("Input secret words : ")
+
+print("Text : " + text)
+print("Shift : " + str(s))
+print("Cipher: " + encrypt(text, s))