practiced enum and unions

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"))