size (200,200);
background(127);
noStroke();

// PART 1

int loc = 50;

// Note the use of brackets in the if/else construction
if (loc == 50) {
  println("loc is 50!");
} else {
  println("loc is not 50!");
}

/*

// PART 2
// Do something more interesting with those variables - create shapes

int loc = 50;
int diam = 50;
if (loc == 50) {
  println("loc is 50!");
  rect(loc, loc, diam, diam);
} else {
  println("loc is not 50!");
  ellipse(loc, loc, diam, diam);
}

// PART 3
// Change the int to a float because randomn produces float data not int
float loc = random(100);
int diam = 50;

// Use a relational operator to determine the value of loc 
// and moke a decision based on that value.
// Relational Operators:
// > (greater than)
// < (less than)
// >= (greater than or equal to)
// <= (less than or equal to)
// == (equality)
// != (inequality)

if (loc <= 50) {
  println("loc is less than or equal to 50!");
  rect (loc, loc, diam, diam);
} else {
  println("loc is more than 50!");
  ellipse(loc, loc, diam, diam);
}

// PART 4

float loc = random(100);
float diam = random (100);

// Use logical operator to test for more than one condition at once
// Logical operators 
// || (logical OR)
// && (logical AND)
// ! (logical NOT)

if (loc <= 50 && diam <= 50) {
  println("loc is less than or equal to 50 and daim is less than or equal to 50");
  rect(loc, loc, diam, diam);
} else if (loc <= 50 && diam > 50) {
  println("loc is less than or equal to 50 and daim is greater than 50");
  fill(0);
  rect(loc, loc, diam, diam);
} else if (loc > 50 && diam <= 50) {
  println("loc is more than 50 and daim is less than or equal to 50");
  ellipse(loc, loc, diam, diam);
} else if (loc > 50 && diam > 50) {
  println("loc is more than 50 and daim is greater than 50");
  fill(0);
  ellipse(loc, loc, diam, diam);
}

// PART 5

float loc = random(100);
float diam = random (100);

// Use nested conditionals to test values and change results in a more flexible manner
// It becomes even more important here to understand the role of the curly bracket 
// and how it relates to the scope of the commands

if (loc <= 50) {
  println("loc is less than or equal to 50");
  if (diam <= 50) {
    println ("daim is less than or equal to 50");
  } else {
    println ("daim is greater than 50");
    fill (0);
  } 
  rect(loc, loc, diam, diam);
} else {
  println("loc is more than 50");
  if (diam <= 50) {
    println ("daim is less than or equal to 50");
  } else {
    println ("daim is greater than 50");
    fill (0);
  }
  ellipse(loc, loc, diam, diam);
}

//  PART 6

float loc = random(100);
float diam = random (100);
 
// Use an iteration to keep drawing shapes randomly on top of each other until an arbitrary number of shapes has been drawn
// Controls a sequence of repetitions. A for() structure has three parts: init, test, and update. 
// Each part must be separated by a semi-colon ";". The loop continues until the test evaluates to false. 
// When a for() structure is executed, the following sequence of events occurs:
// 1. The init statement is executed
// 2. The test is evaluated to be true or false
// 3. If the test is true, jump to step 4. If the test is False, jump to step 6
// 4. Execute the statements within the block
// 5. Execute the update statement and jump to step 2
// 6. Exit the loop.

for(int i=0; i<3; i=i+1) { 
  if (loc <= 50) {
    println("loc is less than or equal to 50");
    if (diam <= 50) {
      println ("daim is less than or equal to 50");
    } else {
      println ("daim is greater than 50");
      fill (0);
    } 
    rect(loc, loc, diam, diam);
  } else {
    println("loc is more than 50");
    if (diam <= 50) {
      println ("daim is less than or equal to 50");
     } else {
      println ("daim is greater than 50");
      fill (0);
    }
    ellipse(loc, loc, diam, diam);
  }
   // you must tell the computer to generate new random numbers at the end of the cycle 
   // or you will simply repeat drawing the same shape over and over
  loc = random(100);
  diam = random (100);
  
  // in this construction you must als tell the computer to set the fill color to white each time
  // or you might end up drawing a shap with a small diameter that is black!
  fill(255);
}

*/