example.lox

print "Nearly-complete example";
print "";

print "Declare a as 4";
var a = 4;

print "Assignment is an expression of value the assigned value, here 8";
print a = 8;

print "";

{
	print "Enter block";
	print "Shadow a with 12";
	var a = 12;

	print "Here a is now:";
	print a;
}

print "Leave block";
print "";

print "Now a is back to:";
print a;
print "";

print "Is 1+1 < 1 ?";
if (1+1 < 1)
	print "Yes, 1+1 < 1";
else
	print "No, 1+1 >= 1";

"This is dead code";

var forty_two = (3+3) * 8 - 6;
var hello = "Hello, ";
var world = "World !";

print "";

print "hi" or 2; // "hi"
print nil or "yes"; // "yes"
print "hi" and 2; // 2
print nil and "yes";// nil
print "";

print "We got concatenation, too:";
print hello + world;
print "";

print "The answer to (3+3) * 8 - 6 is:"; print forty_two;
print "";

fun factorial(n) {
  var acc = 1;

  for (var i = 1; i <= n; i = i + 1) {
    acc = acc * i;
  }

  print acc;
}

print "The factorials of 169, 170 and 171 are:";
print "";

var A = clock();

factorial(169);
factorial(170);
factorial(171);

var B = clock();

print "That last one's quite big ! Seconds taken to compute:";
print B - A;
print "";
print "Yeah who uses seconds";