Passing Data Inside

We can pass data into a function via parameters.

function showMessage(from, text = "no text added") {
  alert(from + ": " + text);
}

showMessage('Anna', 'Hello!'); // Anna: Hello!
showMessage('Anna'); // Anna: no text added

Parameters vs Arguments

• Parameters are variables listed in the parentheses during the function declaration (from, text).
• Arguments are the actual values passed to the function during the call ('Anna', 'Hello!').