1 files changed, 11 insertions, 2 deletions
diff --git a/src/com/craftinginterpreters/lox/Interpreter.java b/src/com/craftinginterpreters/lox/Interpreter.java
index 9d0cfb3..22c8d4a 100644
--- a/src/com/craftinginterpreters/lox/Interpreter.java
+++ b/src/com/craftinginterpreters/lox/Interpreter.java
@@ -161,14 +161,23 @@ class Interpreter implements Expr.Visitor<Object>, Stmt.Visitor<Void> {
 
     @Override
     public Void visitWhileStmt(Stmt.While stmt) {
-        while (isTruthy(evaluate(stmt.condition))) {
-            execute(stmt.body);
+        try {
+            while (isTruthy(evaluate(stmt.condition))) {
+                execute(stmt.body);
+            }
+        } catch (Break ex) {
+            // We continue on.
         }
 
         return null;
     }
 
     @Override
+    public Void visitBreakStmt(Stmt.Break stmt) {
+        throw new Break();
+    }
+
+    @Override
     public Object visitAssignExpr(Expr.Assign expr) {
         Object value = evaluate(expr.value);
         environment.assign(expr.name, value);