diff --git a/1a. The Basics.playground/contents.xcplayground b/1a. The Basics.playground/contents.xcplayground
index 18a12f6..8e39341 100644
--- a/1a. The Basics.playground/contents.xcplayground
+++ b/1a. The Basics.playground/contents.xcplayground
@@ -4,4 +4,4 @@
-
+
\ No newline at end of file
diff --git a/1a. The Basics.playground/playground.xcworkspace/contents.xcworkspacedata b/1a. The Basics.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/1a. The Basics.playground/playground.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
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diff --git a/1a. The Basics.playground/playground.xcworkspace/xcshareddata/1a. The Basics.xccheckout b/1a. The Basics.playground/playground.xcworkspace/xcshareddata/1a. The Basics.xccheckout
new file mode 100644
index 0000000..8d77495
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diff --git a/1a. The Basics.playground/playground.xcworkspace/xcuserdata/emmanuelbernard.xcuserdatad/UserInterfaceState.xcuserstate b/1a. The Basics.playground/playground.xcworkspace/xcuserdata/emmanuelbernard.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..b2e8b44
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diff --git a/1a. The Basics.playground/section-1.swift b/1a. The Basics.playground/section-1.swift
index 1dd68fd..76e3dde 100644
--- a/1a. The Basics.playground/section-1.swift
+++ b/1a. The Basics.playground/section-1.swift
@@ -34,6 +34,11 @@ currentLoginAttempt += 1
let a = 10, b = 20, c = 30
var x = 0.0, y = 0.0, z = 0.0
+
+let fk : Float = 30
+
+// what is float ?
+
// Specifying the type with type annotations
//
// The built-in types in Swift are: Int, Double, Float, Bool, String, Array, Dictionary
diff --git a/1a. The Basics.playground/timeline.xctimeline b/1a. The Basics.playground/timeline.xctimeline
index ae188c4..c65f497 100644
--- a/1a. The Basics.playground/timeline.xctimeline
+++ b/1a. The Basics.playground/timeline.xctimeline
@@ -3,10 +3,14 @@
version = "3.0">
+ documentLocation = "#CharacterRangeLen=0&CharacterRangeLoc=8863&EndingColumnNumber=5&EndingLineNumber=4&StartingColumnNumber=4&StartingLineNumber=4&Timestamp=453238999.106764"
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+ selectedRepresentationIndex = "0"
+ shouldTrackSuperviewWidth = "NO">
diff --git a/1d. Optionals.playground/contents.xcplayground b/1d. Optionals.playground/contents.xcplayground
index 18a12f6..8e39341 100644
--- a/1d. Optionals.playground/contents.xcplayground
+++ b/1d. Optionals.playground/contents.xcplayground
@@ -4,4 +4,4 @@
-
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new file mode 100644
index 0000000..919434a
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new file mode 100644
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diff --git a/1d. Optionals.playground/playground.xcworkspace/xcuserdata/emmanuelbernard.xcuserdatad/UserInterfaceState.xcuserstate b/1d. Optionals.playground/playground.xcworkspace/xcuserdata/emmanuelbernard.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..1103cde
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diff --git a/1d. Optionals.playground/timeline.xctimeline b/1d. Optionals.playground/timeline.xctimeline
index ba175f8..f7484b6 100644
--- a/1d. Optionals.playground/timeline.xctimeline
+++ b/1d. Optionals.playground/timeline.xctimeline
@@ -3,7 +3,9 @@
version = "3.0">
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diff --git a/README.md b/README.md
index e5ddcf3..2b9884b 100644
--- a/README.md
+++ b/README.md
@@ -39,3 +39,4 @@ Learn Apple's Swift programming language interactively through these playgrounds
Thanks to Rafał Wójcik for his quick work to update these playgrounds to
incorporate the Swift language changes that came with XCode Beta 3.
+hwkwidlh
\ No newline at end of file