500) {
echo '' . "$a + $b = $suma
" . '';
}
if ($suma >=250 && $suma <=500) {
echo '' . "$a + $b = $suma
" . '';
}
if ($suma <250) {
echo "$a + $b = $suma
";
}
break;
case "resta": echo "$a - $b = "; while($b-- != 0) { $a--; } {
echo "$a
";
}
break;
case "multiplicar": for ($x = $a * $b; $x > 0; $x -= $a)
echo "$a * $b = $x
";
}
?>