26 lines
502 B
Java
26 lines
502 B
Java
package Course_Codes;
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import java.util.Scanner;
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public class 素数的判断 {
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public static void main(String[] args) {
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Scanner sc=new Scanner(System.in);
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while(sc.hasNext()) {
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int n=sc.nextInt();
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System.out.println(isprime(n)?"Yes":"No");
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}
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}
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public static Boolean isprime(int n) {
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//排除特殊情况：0 1
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if(n<1)
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return false;
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//i*i<n 无需从2——n全部遍历，只需遍历其一半即可，
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for(int i=2;i*i<n;i++)
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if(n%i==0)
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return false;
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return true;
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}
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}
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