/**
 * 4 basic types of statements:
 * 
 * 1. Variable declaration
 * int x;
 * JFrame j;
 * 
 * 2. Variable assignment
 * x = 45;
 * j = new JFrame();
 * 
 * 3. return
 * return 24.2;
 * return 34 + 23 / 2;
 * return j;
 * return "Monday";
 * 
 * 4. method calls
 * j.setVisible(true);
 * "hello".substring(0, 3);
 * 
 * more complex statements:
 * if-statements
 */ 
  
// if (boolean-expression) {
//   then-part
// }

int i=10, j=20, max;
i
j
max
if (i<j) {
   max =j
}

i = 30 
if (i<j) {
   max =j
}

max

// if(boolean-expression) {
//   then-part
// }
// else {
//    else-part
// }


i=10; j=20; max=0;
i
j
max
if (i<j) {
   max =j
}
else{
   max =i
}
max
 
int numEnrolled = 0;
int maxEnrolled = 10;
// If there is room in the course, then enrol a student.
// enrol a student: numEnrolled++;
// there is room in the course: numEnrolled < maxEnrolled
// if(there is room in the course) {
//   enrol a student
// }
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
numEnrolled
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
numEnrolled
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
numEnrolled
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
numEnrolled
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
numEnrolled
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
  }
numEnrolled


System.out.println("test"); // displays "test" on the screen
//out is a static object in "System" class

if(numEnrolled < maxEnrolled) {
    numEnrolled++;
    System.out.println("You are enrolled.");
  }

if(numEnrolled < maxEnrolled) {
    numEnrolled++;
    System.out.println("You are enrolled.");
  } else {

    System.out.println("Course is full.");
  }

maxEnrolled = 12;
if(numEnrolled < maxEnrolled) {
    numEnrolled++;
    System.out.println("You are enrolled.");
  } else {

    System.out.println("Course is full.");
  }

if(numEnrolled < maxEnrolled) {
    numEnrolled++;
    System.out.println("You are enrolled.");
  } else {

    System.out.println("Course is full.");
  }

if(numEnrolled < maxEnrolled) {
    numEnrolled++;
    System.out.println("You are enrolled.");
  } else {

    System.out.println("Course is full.");
  }

//what if maxEnrolled is 50, or say 10000000?
//we use loop! for now we use "while loop"
int numEnrolled = 20;
int maxEnrolled = 10;
while (numEnrolled < maxEnrolled){
    numEnrolled++;
    System.out.println("Enrolled. You are student no:" + numEnrolled);
}


numEnrolled = 0;
maxEnrolled = 100;
while (numEnrolled < maxEnrolled){
    numEnrolled++;
    System.out.println("Enrolled. You are student no:" + numEnrolled);
}


//now let's write Grades class

Grades.passFail(80)
Grades.passFail(45)
Grades.passFail(90)
Grades.passFail(110)
Grades.passFail(99)
Grades.passFail(100)
Grades.passFail(69)
Grades.passFail(12)
Grades.passFail(33)
Grades.passFail(12)
Grades.passFail(1)
Grades.passFail(-10)
//now let's write the passFail with || instead of &&