add lila source example files

examples/addition.lila

@@ -0,0 +1,3 @@
+fn add(a: int, b: int) int {
+	a + b
+}

examples/assign.lila

@@ -0,0 +1,4 @@
+fn main() {
+	a = 0;
+	set a = 1;
+}

examples/block_as_expr.lila

@@ -0,0 +1,6 @@
+fn main() {
+	val = {
+		a = 42;
+		a
+	};
+}

examples/hello.lila

@@ -0,0 +1,3 @@
+fn main() {
+	println("Hello there!");
+}

examples/if_expr.lila

@@ -0,0 +1,7 @@
+fn main() {
+	val = if true {
+		42
+	} else {
+		1337
+	};
+}

examples/infinite_calls.lila

@@ -0,0 +1,9 @@
+fn foo(a: int) int {
+	b = baz(a);
+	b
+}
+
+fn baz(b: int) int {
+	a = foo(b);
+	a
+}

examples/strings.lila

@@ -0,0 +1,4 @@
+fn main() {
+	destination = "unknown";
+	set destination = "to the moon";
+}

examples/syracuse.lila

@@ -0,0 +1,13 @@
+// Computes the syracuse sequence with the given inital term
+// until it reaches 1 (it probably will).
+fn syracuse(x0: int) int {
+	x = x0;
+	while x != 1 {
+		if x % 2 == 0 {
+			set x = x / 2;
+		} else {
+			set x = 3 * x + 1;
+		};
+	};
+	x
+}