How to write the assignment that cannot be divisible by 100 and 400
$a=2000; if (($a%400==0)&&($a%100==0)) { echo "整除！"; }else{ echo "不整除了！"; }
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$a=2000; if (($a%400==0)&&($a%100==0)) { echo "整除！"; }else{ echo "不整除了！"; }