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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
 
		int n = math.random(1, 10);
		for (int j=0; j<10; j++)
		if (n(7) == j) {
			System.out.println("you win $100");
 
 
		}
		while (n != 7) {
			System.out.println ("You are a failure! Try again!");
		}
 
 
 
	}
 
}

Main.java:13: error: cannot find symbol
		int n = math.random(1, 10);
		        ^
  symbol:   variable math
  location: class Ideone
Main.java:15: error: cannot find symbol
		if (n(7) == j) {
		    ^
  symbol:   method n(int)
  location: class Ideone
2 errors

Standard output is empty