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Print Prime Numbers contained by the Array in JAVA

CODING:
class prime
{
 public static void main(String[] args)
  {
    int[] num={5,13,24,18,9,7,33,10,56,23};
    int k,i,flag=0;
     for(k=0;k<10;k++)
      {
for(i=2;i<=num[k]/2;i++)
{
  if(num[k]%i==0)
   {
     flag=1;
     break;
   }
}
     if(flag==0)
System.out.print(num[k] + " ");
flag=0;
      }
  }

}

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