Got this error : illegal start of expression (at line 18)

Question

public class DetermineScore{
public static void main (string[] args) {
scanner input = new scanner (System.in);
system.out.println("Enter Number of Student: ");
int studentNumber = input.nextInt();
int[] score = new int[studentNumber];
char grade;
System.out.println("Enter" + studentNumber + "score:");
for (int i = 0; i < scores.length; i++){
if(score[i] > best)
best = scores[i];
}
String output = "";
for (int i = 0; i< scores.length; i++) }
if (scores[i] >= 90-100)
grade = 'A';
else if (scores[i] >= 80-89)
grade = 'B';
else if (scores[i] >= 70-79)
grade = 'C';
else if (scores[i] >= 60-69)
grade = 'D';
else if (scores[i] >= 0-59)
grade = 'F';
System.out.println("sorry you have no part here, FAILED.");
}
}

Answer 1

for (int i = 0; i < scores.length; i++) }
You need to put "{" instead of "}"
Probably TYPO :D
Another thing. Why you use
if (scores[i] >= 90-100)
i guess you want to check if the scores[i] is between 90 and 100. Propper way to do so is:
if (scores[i] >= 90 && scores[i] <= 100) etc.
90-100 = -10 so you are checking if scores[i] is greater than or equal to -10. If that's what you wanted to do, than it is OK.