diff --git a/source/chapter1/02_a_swift_tour.md b/source/chapter1/02_a_swift_tour.md
index 480f8ae2..60517cd5 100755
--- a/source/chapter1/02_a_swift_tour.md
+++ b/source/chapter1/02_a_swift_tour.md
@@ -205,14 +205,14 @@ m
 
 ```swift
 var firstForLoop = 0
-for i in 0..<3 {
+for i in 0..<4 {
     firstForLoop += i
 }
 firstForLoop
 
 var secondForLoop = 0
-for var i = 0; i < 3; ++i {
-    secondForLoop += 1
+for var i = 0; i < 4; ++i {
+    secondForLoop += i
 }
 secondForLoop
 ```