Create a function that takes an array containing only values of the same type and return the first element.
GetFirstValue([5, 6, 7]) ➞ 5
GetFirstValue(["Semiramis", "Gaia", "Hypatia"]) ➞ "Semiramis"
GetFirstValue([true, false, true]) ➞ trueThe first element in an array always has an index of 0.