// ifControlStatement.jsx
// Copyright 2007
// Written by Jeffrey Tranberry
// Photoshop for Geeks Version 1.0

/* 
Description:
'If' control statements using
Comparison and Logical operators
*/

// enable double clicking from the 
// Macintosh Finder or the Windows Explorer
#target photoshop

// Make Photoshop the frontmost application
// in case we double clicked the file
app.bringToFront();


///////////////////////
//         MAIN          //
//////////////////////

//  Using Comparison operators:
//  == (equal to)
//   < (less than)
//   > (greater than)
//  <= (less than or equal to)
//  >=(greater than or equal to)

// Create a variable.
// In this case we store a number.
var x = 10;

// An 'if' control statement, boolean test.
// Use the == operator to see if the numbers are equal.
// In this case it is false so they are equal.
if (x == 4) {
	alert ('x is equal to 4');
}
else {
	alert ('x is not equal to 4');
}


// An 'if' control statement, boolean test.
// Use the < operator to see if the number is less than.
// In this case it is false so the variable is greater than 4.
if (x < 4) {
	alert ('x is less than 4');
}
else {
	alert ('x is greater than 4');
}


// Two variables to compare.
// In this case, we're evaluating strings
var name1 = "Jeffrey Tranberry";
var name2 = "Jeffrey Tranberry";

// An 'if' control statement, boolean test.
// Use the == operator to see if the strings are equal.
// In this case it is true so they are equal.
if (name1 == name2){
	alert ( 'name1 and name2 are the same.');
}
else  {
	alert ( 'name1 and name2 are not the same.');
}


// Two more variables to compare.	
var name1 = "Jeffrey Tranberry";
var name2 = "Jeffrey Transberry";

// 'if' control statement, boolean test.
// Use the == operator to see if the strings are equal.
// In this case it is false (because there is a superfluous 's' in the word 'Tranberry' in string2) so they are **not** equal
if (name1 == name2){
	alert ( 'name1 and name2 are the same.');
}
else  {
	alert ( 'name1 and name2 are not the same.');
}



//  Using Logical operators 
//  && (and)
//   || (or)
//    ! (not)

// Two variables to evaluate.
var sailBoat =  false;
var wind = false;

// Check to see if you have a sail boat *and* wind
if ( sailBoat == true && wind == true) {
	alert ("You have wind in your sails.");
	
// else if tests for a different condition
// In this case, see if we have a sail boat *and* no wind.
} else if (sailBoat == true && wind == false) {
	alert ("You're stuck without wind. Better sart rowing.");
	
// Finally, if neither condition is met
} else {
	alert ("You don't have a sail boat or wind. You must be stuck on an island.");
}