What is the main function of TypeScript in software development?

The main function of TypeScript is to add static typing to JavaScript. This helps developers catch errors at compile time rather than at runtime, improves code readability and maintainability, and makes working with large projects easier. TypeScript extends JavaScript's capabilities by allowing the use of types, interfaces, enums, and other constructs, which increases the reliability and quality of the code.

Example:

function greet(name: string): string {
  return `Hello, ${name}!`;
}

console.log(greet("World"));
// If a number is passed, TypeScript will throw an error at compile time
// greet(123); // Error