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; $b < 10; $x += $a) {
echo ' ' . "$a * $b = $x
" . ' |
'; $b++;
}
}
?>