//array range ( mixed low, mixed high [, number step] )
$questions = range(1, 10, 2);
// gives 1, 3, 5, 7, 9
$questions = range(1, 10, 3)
// gives 1, 4, 7, 10
$questions = range(10, 100, 10);
// gives 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
$float = range(1, 10, 1.2);
// gives 1, 2.2, 3.4, 4.6, 5.8, 7, 8.2, 9.4
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