September 2017 Update

Task/Caesar-cipher/Swift/caesar-cipher.swift

@@ -0,0 +1,65 @@
+var arr:[Character]=["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
+
+func res(st:String,ar:[Character],x:Int,ro:String)->String{
+
+    var str2:[Character]=[]
+
+    for i in st.characters
+    {
+
+        for j in 0...25
+        {
+
+
+            if i==ar[j]
+            {
+
+                switch ro
+                {
+                    case "right":
+
+                    if(j+x<=25)
+                    {
+
+                        str2.append(ar[j+x])
+                        break
+
+                    }
+                    else
+                    {
+
+                        str2.append(ar[j+x-26])
+                        break
+                    }
+
+                    case "left":
+
+                     if(j-x>=0)
+                    {
+
+                        str2.append(ar[j-x])
+                        break
+                    }
+                    else
+                    {
+
+                        str2.append(ar[j-x+26])
+                        break
+                    }
+                   default:
+                   print("incorrect input for rotation direction")
+                }
+
+
+            }
+        }
+    }
+
+    return String(str2)
+}
+
+var mssg:String="hi"
+var x1:Int=5
+var rot:String="right"
+var rotstr:String=res(st:mssg,ar:arr,x:x1,ro:rot)
+print(rotstr)