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Get array elements

The elements of an array are accessed by an index beginning with 0. 
let languages = ['C', 'C++', 'Java'];
let c = languages[0];
let cPlusPlus = languages[1];
let java = languages[2];

Exercise

Write a function getFirstElement that takes an array and returns the first element of the array.

Example: getFirstElement([1, 2]) should return 1.
function getFirstElement(arr) {
  return ...
}
function getFirstElement(arr) {
  return arr[0];
}

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