题解 | #判断质数#
判断质数
https://www.nowcoder.com/practice/b936f737e2b34b3199a7c875446edd06
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<html lang="en">
<head>
<meta charset="UTF-8">
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<title>Document</title>
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<body>
<script>
Number.prototype._isPrime = function (num) {
let numSqrt = parseInt(Math.sqrt(num));
for (let i = 2; i <= numSqrt; i++) {
if (num % i == 0) return false;
}
return true;
}
var res = Number.prototype._isPrime(9);
console.log(res)
</script>
</body>
</html>
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