diff --git a/test_ts/dist/index.js b/test_ts/dist/index.js
index 338ea00..a8b179b 100644
--- a/test_ts/dist/index.js
+++ b/test_ts/dist/index.js
@@ -15,6 +15,7 @@ function numbers(a, b) {
     return a + b;
 }
 numbers(2, 3);
+let cgpa = 0.7;
 // Arrays
 const elements = ['Hydrogen', "Zinc", "Carbon"];
 elements.map((element) => element);
@@ -24,4 +25,26 @@ let place = ['Yemmiganur', 518360];
 // place[1]. you will get all number built in functions
 place.push('Great');
 console.log(place, 'this is place');
+//enum  a list of related constants
+var FoodItemSizes;
+(function (FoodItemSizes) {
+    FoodItemSizes[FoodItemSizes["Small"] = 0] = "Small";
+    FoodItemSizes[FoodItemSizes["Medium"] = 1] = "Medium";
+    FoodItemSizes[FoodItemSizes["Large"] = 2] = "Large";
+    FoodItemSizes[FoodItemSizes["ExtraLarge"] = 3] = "ExtraLarge";
+})(FoodItemSizes || (FoodItemSizes = {}));
+let foodItem = FoodItemSizes.ExtraLarge;
+console.log(foodItem, 'This is my food');
+// Union Types
+let dob = 29012006;
+function changeCMtoMM(dime) {
+    //Narrowing;
+    if (typeof dime === "number") {
+        return dime * 10;
+    }
+    else {
+        return parseInt(dime) * 10;
+    }
+}
+console.log(changeCMtoMM("20"));
 //# sourceMappingURL=index.js.map
\ No newline at end of file
diff --git a/test_ts/dist/index.js.map b/test_ts/dist/index.js.map
index 838847c..8afe53d 100644
--- a/test_ts/dist/index.js.map
+++ b/test_ts/dist/index.js.map
@@ -1 +1 @@
-{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;AAMA,MAAM,MAAM,GAAQ;IAChB,IAAI,EAAE,WAAW;IACjB,KAAK,EAAE,aAAa;IACpB,GAAG,EAAG,EAAE;CACX,CAAA;AAGD,SAAS,OAAO;IACZ,IAAG,MAAM,CAAC,GAAG,GAAG,EAAE;QAAE,OAAO,OAAO,CAAC,GAAG,CAAC,gBAAgB,CAAC,CAAA;AAC5D,CAAC;AAED,OAAO,EAAE,CAAA;AAET,SAAS,OAAO,CAAC,CAAQ,EAAC,CAAQ;IAC9B,OAAO,CAAC,GAAG,CAAC,CAAC,GAAC,CAAC,CAAC,CAAC;IACjB,OAAO,CAAC,GAAC,CAAC,CAAC;AACf,CAAC;AAED,OAAO,CAAC,CAAC,EAAC,CAAC,CAAC,CAAA;AAEZ,SAAS;AACT,MAAM,QAAQ,GAAY,CAAC,UAAU,EAAE,MAAM,EAAE,QAAQ,CAAC,CAAA;AACxD,QAAQ,CAAC,GAAG,CAAC,CAAC,OAAO,EAAE,EAAE,CAAC,OAAO,CAAC,CAAA;AAElC,SAAS;AACT,IAAI,KAAK,GAAoB,CAAC,YAAY,EAAE,MAAM,CAAC,CAAA;AACnD,uDAAuD;AACvD,uDAAuD;AACvD,KAAK,CAAC,IAAI,CAAC,OAAO,CAAC,CAAA;AACnB,OAAO,CAAC,GAAG,CAAC,KAAK,EAAE,eAAe,CAAC,CAAA"}
\ No newline at end of file
+{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;AAMA,MAAM,MAAM,GAAQ;IAChB,IAAI,EAAE,WAAW;IACjB,KAAK,EAAE,aAAa;IACpB,GAAG,EAAG,EAAE;CACX,CAAA;AAGD,SAAS,OAAO;IACZ,IAAG,MAAM,CAAC,GAAG,GAAG,EAAE;QAAE,OAAO,OAAO,CAAC,GAAG,CAAC,gBAAgB,CAAC,CAAA;AAC5D,CAAC;AAED,OAAO,EAAE,CAAA;AAET,SAAS,OAAO,CAAC,CAAQ,EAAC,CAAQ;IAC9B,OAAO,CAAC,GAAG,CAAC,CAAC,GAAC,CAAC,CAAC,CAAC;IACjB,OAAO,CAAC,GAAC,CAAC,CAAC;AACf,CAAC;AAED,OAAO,CAAC,CAAC,EAAC,CAAC,CAAC,CAAA;AAGZ,IAAI,IAAI,GAAU,GAAG,CAAA;AAErB,SAAS;AACT,MAAM,QAAQ,GAAY,CAAC,UAAU,EAAE,MAAM,EAAE,QAAQ,CAAC,CAAA;AACxD,QAAQ,CAAC,GAAG,CAAC,CAAC,OAAO,EAAE,EAAE,CAAC,OAAO,CAAC,CAAA;AAElC,SAAS;AACT,IAAI,KAAK,GAAoB,CAAC,YAAY,EAAE,MAAM,CAAC,CAAA;AACnD,uDAAuD;AACvD,uDAAuD;AACvD,KAAK,CAAC,IAAI,CAAC,OAAO,CAAC,CAAA;AACnB,OAAO,CAAC,GAAG,CAAC,KAAK,EAAE,eAAe,CAAC,CAAA;AAEnC,mCAAmC;AACnC,IAAK,aAAgD;AAArD,WAAK,aAAa;IAAE,mDAAK,CAAA;IAAE,qDAAM,CAAA;IAAE,mDAAK,CAAA;IAAE,6DAAU,CAAA;AAAA,CAAC,EAAhD,aAAa,KAAb,aAAa,QAAmC;AACrD,IAAI,QAAQ,GAAG,aAAa,CAAC,UAAU,CAAA;AACvC,OAAO,CAAC,GAAG,CAAC,QAAQ,EAAE,iBAAiB,CAAC,CAAA;AAGxC,cAAc;AACd,IAAI,GAAG,GAAqB,QAAQ,CAAC;AAErC,SAAS,YAAY,CAAC,IAAwB;IAC1C,YAAY;IACZ,IAAG,OAAO,IAAI,KAAK,QAAQ,EAAC,CAAC;QACzB,OAAO,IAAI,GAAG,EAAE,CAAA;IACpB,CAAC;SACG,CAAC;QACD,OAAO,QAAQ,CAAC,IAAI,CAAC,GAAG,EAAE,CAAA;IAC9B,CAAC;AACL,CAAC;AAED,OAAO,CAAC,GAAG,CAAC,YAAY,CAAC,IAAI,CAAC,CAAC,CAAA"}
\ No newline at end of file
diff --git a/test_ts/src/index.ts b/test_ts/src/index.ts
index c7c15ab..7840c4c 100644
--- a/test_ts/src/index.ts
+++ b/test_ts/src/index.ts
@@ -24,6 +24,9 @@ function numbers(a:number,b:number) : number{
 
 numbers(2,3)
 
+
+let cgpa:number = 0.7
+
 // Arrays
 const elements:string[] = ['Hydrogen', "Zinc", "Carbon"]
 elements.map((element) => element)
@@ -35,3 +38,21 @@ let place:[string, number] = ['Yemmiganur', 518360]
 place.push('Great')
 console.log(place, 'this is place')
 
+//enum  a list of related constants
+enum FoodItemSizes {Small, Medium, Large, ExtraLarge}
+let foodItem = FoodItemSizes.ExtraLarge
+console.log(foodItem, 'This is my food')
+
+
+// Union Types
+let dob: (number | string)= 29012006;
+function changeCMtoMM(dime : (number | string)){
+    //Narrowing;
+    if(typeof dime === "number"){
+        return dime * 10
+    }
+    else{
+        return parseInt(dime) * 10
+    }
+}
+console.log(changeCMtoMM("20"))