Functions in ts

AritraC1 · AritraC1 · commit 18916d0b99d8 · 2025-05-27T14:15:14.000+05:30
diff --git a/TS/Basics/functions.ts b/TS/Basics/functions.ts
@@ -0,0 +1,51 @@
+// FUNCTIONS
+
+function addTwo(num: number): number {
+    return num + 2;
+    // return "hello" // error
+}
+
+function getUpper(word: string){
+    return word.toUpperCase();
+}
+
+function signUpuser(name: string, email: string, isPaid: boolean){}
+
+let loginUser = (name: string, email: string, isPaid: boolean = false) => {} // entering the default value
+
+console.log(addTwo(5));
+console.log(getUpper("hello"));
+signUpuser("Tony", "ironman@avengers.com", false);
+loginUser("Peter", "pete@avengers.com")
+
+
+// function getVal(myVal: number){
+//     if (myVal > 5) {
+//         return true
+//     }
+//     return "200 OK"
+// }
+
+const getGreetings = (greet: string): string => {
+    return "";
+}
+
+const heroes = ["thor", "spiderman", "ironman"]
+// const heroes = [1, 2, 3]
+
+heroes.map((hero): string => {
+    return `Hero is ${hero}`
+})
+
+// void represents the return value of functions which don’t return a value. It’s the inferred type any time a function doesn’t have any return statements, or doesn’t return any explicit value from those return statements
+function consoleError(errorMsg: string): void{
+    console.log(errorMsg);
+}
+
+// The never type represents values which are never observed. In a return type, this means that the function throws an exception or terminates execution of the program.
+function handleError(errorMsg: string): never{
+    throw new Error(errorMsg);
+}
+
+
+export{}
