What are the return types of functions in TypeScript?

What are the return types of functions in TypeScript?

In TypeScript, you can specify the return type of a function by adding a colon followed by the type after the parameter list. For example, function add(a: number, b: number): number { return a + b; }.

Can you give me examples of different return types?

Sure! Here are a few examples: 1. (): void for functions that do not return a value. 2. (): string for functions that return a string. 3. (): number for functions that return a number.

What happens if I don't specify a return type?

If you don't specify a return type, TypeScript will infer the return type based on the function's implementation. However, it's a good practice to specify it for better readability and maintainability.

Can I use union types as return types?

Yes, you can use union types as return types. For example, function getValue(): string | number { return Math.random() > 0.5 ? 'Hello' : 42; } allows the function to return either a string or a number.