// Day 4: 
// Example: variables, if, if-else
// mjh-2013

// initialize program
size(600, 450);
background(255);
textSize(20);
fill(0);


// basic data types that come with Processing (Java)
// these are called "primitive types"

int x = 3;        // integers
float y = 3.145;  // decimal numbers (approximations of reals)
boolean z = true; // true/false values for logic
char c = 'Q';     // a single character inside single quotes

// a String is not a primitive type, but is very useful.  
// We use a string for a collection of characters (i.e., words)

String s = "Hello!";


text( "integer x = " + x, 25, 50);
text( "float   y = " + y, 25, 75);
text( "boolean z = " + z, 25, 100);
text( "char    c = " + c, 25, 125);
text( "String  s = " + s, 25, 150);


// basic branching is done with the "if" statement

boolean blueSky = false;

if ( blueSky == true ){
  text("Hooray, let's go outside and play!", 50, 200);
}
else{
  text("Boo. Let's stay inside and write Processing code!", 50, 200);
}
  
blueSky = true;

if ( blueSky == true ){
  text("Hooray, let's go outside and play!", 50, 225);
}
else{
  text("Boo. Let's stay inside and write Processing code!", 50, 225);
}


// additon of String.  Consider the following...
text("some string " + x, 50, 275);          // notice the space at the end 
text("something else " + y, 50, 300);       // of the string
text(x + " other way around!", 50, 325);    // space at the front of stringtext
text( 1 + 3 + " is 1 + 3", 50, 350);
text("1 + 3 is " + 1 + 3, 50, 375);          // make sure you know why
text("1 + 3 really is " + (1 + 3), 50, 400); // these are different!