题解 | #判断质数#
判断质数
https://www.nowcoder.com/practice/b936f737e2b34b3199a7c875446edd06
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <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>