include 
                  int main()
                  {
                  
                    //for loop
                    /*
                    int grade,counter=1;
                    for(;counter<=20;counter++)
                    {
                        printf("student grade\"%d\"=",counter);
                        scanf("%d",&grade);
                        if(grade>=60&&grade<=100)
                        printf("passed\n");
                        else if(grade>100)
                        printf("enter real grade");
                    }*/
                    
                    //while loop
                    
                    int grade,counter=1;
                    while(counter<=20)
                    {
                      printf("student grade\"%d\"=",counter);
                      scanf("%d",&grade);
                      if(grade>=60&&grade<=100)
                      printf("passed\n");
                      else if(grade>100)
                      printf("enter real grade\n");
                      counter++;
                    }
                    
                    return 0;
                  }