Creates an array of numbers ranging from low to high
@param {number} low
@param {number} high
@returns {Array}
@example range(3, 7); // creates [3, 4, 5, 6, 7]
function range(low, high) {
    const results = [];

    for (var j = low; j <= high; j++) {
        results.push(j);
    }

    return results;
}