diff --git "a/Retos/Reto #24 - CIFRADO C\303\211SAR [F\303\241cil]/kotlin/marchdz.kt" "b/Retos/Reto #24 - CIFRADO C\303\211SAR [F\303\241cil]/kotlin/marchdz.kt"
new file mode 100644
index 0000000000..d3a896b47e
--- /dev/null
+++ "b/Retos/Reto #24 - CIFRADO C\303\211SAR [F\303\241cil]/kotlin/marchdz.kt"	
@@ -0,0 +1,23 @@
+fun caesarCipher(positionsToShift: Int, text: String) {
+    val lowerCase = "abcdefghijklmnopqrstuvwxyz"
+    val upperCase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    var textToPrint = ""
+
+    for (character in text) {
+        textToPrint += when {
+            character.isLowerCase() -> lowerCase[(lowerCase.indexOf(character) + (positionsToShift % 26) + 26) % 26]
+            character.isUpperCase() -> upperCase[(upperCase.indexOf(character) + (positionsToShift % 26) + 26) % 26]
+            else -> character
+        }
+    }
+    println(textToPrint)
+}
+
+fun caesarDecipher(positionsToShift: Int, text: String) {
+    caesarCipher(-positionsToShift, text)
+}
+
+fun main() {
+    caesarCipher(35, "Probando el programa")
+    caesarDecipher(35, "Yaxkjwmx nu yaxpajvj")
+}
\ No newline at end of file