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import java.util.*; class nw { int dis(int p) { int c=0,flag=0; for(int j=1;j<=p;j++) { if(p%j==0) c++; } if(c==2) return 1; } void hui() { int c; int p,q; Scanner sc=new Scanner(System.in); System.out.println("range p"); p=sc.nextInt(); System.out.println("range q"); q=sc.nextInt(); for(int i=p;i<=q;i++) { c=dis(i); if(c==1) { System.out.println(i); }}}} {it says missing return statement! … 
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