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  1. function isprime(number) {
  2. for (let j=2; j<number; j+=1); {
  3. console.log('start');
  4. if (number % j === 0); {
  5. console.log(j);
  6. return false;
  7. }
  8. }
  9. console.log('end');
  10. return true;
  11. }
  12.  
  13.  
  14. console.log(isprime(13));
Runtime error #stdin #stdout #stderr 0.02s 16980KB
stdin
Standard input is empty
stdout
start
stderr
prog.js:4:1 ReferenceError: j is not defined
Stack:
  isprime@prog.js:4:1
  @prog.js:14:13