function agregarSimboloExclamacion(str) { // Agrega un símbolo de exclamación al final del string "str" y retórnalo // Ejemplo: "hello world" ---> "hello world!" // Tu código: }

function agregarSimboloExclamacion(str) {
  return str += "!";
}

agregarSimboloExclamacion("hello world")

Javascript

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Function from Docstring: Provide a docstring to generate the actual function.
Add typing to code: This feature will help you to add typing to your code.
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Time complexity: Get time complexity.
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