diff --git a/README.md b/README.md
index 4452203..811e82f 100644
--- a/README.md
+++ b/README.md
@@ -97,4 +97,29 @@ The simplified explanation of this issue is that a variable or function cannot b
     </html>
     ```
 
-By extrapolating this use case into more complicated environments, implementing dependency handling solutions, such as RequireJS, may assist to track and handle dependency requirements.
\ No newline at end of file
+By extrapolating this use case into more complicated environments, implementing dependency handling solutions, such as RequireJS, may assist to track and handle dependency requirements.
+
+### 6. Data type in strict comparison.
+```
+var x = 10;
+var y = "10";
+if (x === y) //false
+```
+but
+```
+var x = 10;
+var y = "10";
+if (x == y) //true
+```
+
+When using strict comparison (===) the data type does matter. 
+This is good to know when using the switch-statement since it is using strict comparison!
+
+```
+var x = 1;
+switch(x) {
+    case 1: alert("Hello");
+}
+```
+
+This will trigger the alert.