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To define an object type, we simply list its properties and their types.

For example, here’s a function that takes a point-like object:

// The parameter's type annotation is an object type
function printCoord(pt: { x: number; y: number }) {
  console.log("The coordinate's x value is " + pt.x);
  console.log("The coordinate's y value is " + pt.y);

printCoord({ x: 3, y: 7 });

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