diff --git a/examples/fib.php b/examples/fib.php
index 833da104..32a7ca57 100644
--- a/examples/fib.php
+++ b/examples/fib.php
@@ -12,6 +12,16 @@ function main()
 {
     global $argv;
     $n = $argv[2];
+    var_dump($argv, $n);
+
+    if ($n > 100) {
+        echo "Too big number\n";
+        exit(1);
+    } elseif ($n < 1) {
+        echo "Too small number\n";
+        exit(1);
+    }
+
     $begin = microtime(true);
     echo fib($n) . "\n";
     echo "Time: " . (microtime(true) - $begin) . "\n";
diff --git a/src/Php/Translator.php b/src/Php/Translator.php
index addda55b..a7692696 100644
--- a/src/Php/Translator.php
+++ b/src/Php/Translator.php
@@ -361,6 +361,8 @@ class Translator extends \PhpAot\Core\Translator
                 return $this->parseUnaryMinus($expr);
             case 'InterpolatedStringPart':
                 return $this->parseInterpolatedStringPart($expr);
+            case 'Expr_Exit':
+                return $this->parseExit($expr);
             default:
                 debug($expr);
         }
@@ -399,12 +401,7 @@ class Translator extends \PhpAot\Core\Translator
     {
         $type = $this->detectType($v->expr);
         $expr = $this->parseExpr($v->expr);
-        if ($this->returnType == self::TYPE_INT and $type == self::TYPE_VAR) {
-            return 'return (' . $expr . ').toInt()';
-        } elseif ($this->returnType == self::TYPE_FLOAT and $type == self::TYPE_VAR) {
-            return 'return (' . $expr . ').toFloat()';
-        }
-        return 'return ' . $expr;
+        return 'return ' . $this->convertExprType($expr, $this->returnType, $type);
     }
 
     private function parseBinaryOpMul(mixed $expr): string
@@ -1063,15 +1060,25 @@ class Translator extends \PhpAot\Core\Translator
     {
         $expr = $this->parseArg($arg);
         $type = $this->detectType($arg->value);
-        if ($argInfo->type === self::TYPE_INT && $type !== self::TYPE_INT) {
+        return $this->convertExprType($expr, $argInfo->type, $type);
+    }
+
+    private function convertExprType(string $expr, $leftType, $rightType): string
+    {
+        if ($leftType === self::TYPE_INT && $rightType !== self::TYPE_INT) {
             return '(' . $expr . ').toInt()';
         }
-        if ($argInfo->type === self::TYPE_FLOAT && $type !== self::TYPE_FLOAT) {
+        if ($leftType === self::TYPE_FLOAT && $rightType !== self::TYPE_FLOAT) {
             return '(' . $expr . ').toFloat()';
         }
-        if ($argInfo->type === self::TYPE_BOOL && $type !== self::TYPE_BOOL) {
+        if ($leftType === self::TYPE_BOOL && $rightType !== self::TYPE_BOOL) {
             return '(' . $expr . ').toBool()';
         }
         return $expr;
     }
+
+    private function parseExit(Node $node): string
+    {
+        return 'php::exit(' . $this->parseIdentifier($node->expr) . ')';
+    }
 }