Union in TS

AritraC1 · AritraC1 · commit dce329823ba3 · 2025-05-29T11:46:37.000+05:30
diff --git a/TS/Basics/union.ts b/TS/Basics/union.ts
@@ -0,0 +1,49 @@
+// UNION (|)
+
+let score: number|string = 33
+score = "55"
+
+type User = {
+    userName: string,
+    isActive: boolean
+}
+
+type Admin = {
+    name: string,
+    id: number;
+}
+
+let account: User | Admin = {userName: "Spidey", isActive: true}
+account = {name: "Peter", id: 342} 
+
+// function getDBId(id: number | string){
+//     // Making some api calls
+//     console.log(`DB Id: ${id}`);
+// }
+
+getDBId(3);
+getDBId("67");
+
+function getDBId(id: number | string){
+
+    if (typeof id === "string") {
+        id = id.toLowerCase();
+    }
+
+    else if (typeof id === "number") {
+        id = id+2;
+    }
+
+    // Making some api calls
+    console.log(`DB Id: ${id}`);
+}
+
+// Array
+const data: (number | string)[] = [1, 2, 3, 4, "5"]; // Either be all numbers or all strings
+
+// Literal Assignment
+const pi:3.14 = 3.14 // cannot be assigned to any other number
+
+let seatAllotment: "aisle" | "middle " | "window"
+seatAllotment = "aisle"
+// seatAllotment= "crew"
