diff --git a/01_Day_Introduction/exercise_solution/datatype.js b/01_Day_Introduction/exercise_solution/datatype.js
new file mode 100644
index 0000000..69c659d
--- /dev/null
+++ b/01_Day_Introduction/exercise_solution/datatype.js
@@ -0,0 +1,4 @@
+console.log(typeof str);
+console.log(typeof bool);
+console.log(typeof val);
+console.log(typeof valNull);
diff --git a/01_Day_Introduction/exercise_solution/exercise1.js b/01_Day_Introduction/exercise_solution/exercise1.js
new file mode 100644
index 0000000..d7defe3
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+++ b/01_Day_Introduction/exercise_solution/exercise1.js
@@ -0,0 +1,8 @@
+// comments can make code readable
+
+// Welcome to 30DaysOfJavaScript
+
+/* comments can make code
+readable, easy to reuse
+and informative
+*/
diff --git a/01_Day_Introduction/exercise_solution/index.html b/01_Day_Introduction/exercise_solution/index.html
new file mode 100644
index 0000000..25aec01
--- /dev/null
+++ b/01_Day_Introduction/exercise_solution/index.html
@@ -0,0 +1,16 @@
+
+
+
+
+
+
+ Exercise Day1
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/01_Day_Introduction/exercise_solution/variable.js b/01_Day_Introduction/exercise_solution/variable.js
new file mode 100644
index 0000000..91a9368
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+++ b/01_Day_Introduction/exercise_solution/variable.js
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+let str = "Lavanya";
+let bool = true;
+let val;
+let valNull = null;
+
+// Declare variables to store your first name, last name, marital status, country and age in multiple lines
+let fname = "Lavanya";
+let lname = "Sathya";
+let maritalStatus = false;
+let country = "India";
+let age = 25;
+
+// Declare variables to store your first name, last name, marital status, country and age in a single line
+let Fname = "lavanya",
+ Lname = "Sathya",
+ marital = false,
+ Country = "India",
+ Age = 25;
+
+// Declare two variables myAge and yourAge and assign them initial values and log to the browser console.
+const myAge = 25;
+const yourAge = 30;
+console.log(`I am ${myAge} years old.`);
+console.log(`You are ${yourAge} years old.`);