example-3.ts

// Add types here. Be sure to set the types for: 
// - variables
// - function parameters
// - function return

function printCopy(str, n) {
  let result = ''
  for (let i = 0; i < n; i += 1) {
    result += str + '\n'
  }
  return result
}

console.log(printCopy('hello', 3))

// Compile the code and check what type script says: 
// tsc example-3.ts

export {
  printCopy
}