typescript example

TypeScript interface example

Describe a user object with an interface, then print a formatted line. No signup required.

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Interfaces name a shape. Once User exists, greet can accept that shape instead of a loose object.

Add an optional field or a second user and watch how the type guides the edit — then Run to confirm Output.

interface User {
  name: string;
  score: number;
}

function greet(user: User): string {
  return `${user.name} has ${user.score} points`;
}

const player: User = { name: "Asha", score: 12 };
console.log(greet(player));