public class primenumber{
public static void main(String arg[]){
int a,b,c;
System.out.print("1 2 3 5 7");
for(a=11;a<=100;a+=2){
c=0;
for(b=3;b<=7;b+=2)
if(a%b==0)c=1;
if(c==0)System.out.print(" "+a);
}
}
}
100以内的素数
