diff --git a/scanner/scanner.go b/scanner/scanner.go
index 091f227..7b09498 100644
--- a/scanner/scanner.go
+++ b/scanner/scanner.go
@@ -120,7 +120,7 @@ func (s *Scanner) Scan() (tok token.Token) {
 		case '"':
 			tok = token.STRING
 			s.scanString()
-		case '#':
+		case '#', '/':
 			tok = token.COMMENT
 			s.scanComment(ch)
 		case '.':
@@ -156,7 +156,7 @@ func (s *Scanner) Scan() (tok token.Token) {
 }
 
 func (s *Scanner) scanComment(ch rune) {
-	if ch == '#' {
+	if ch == '#' || ch == '/' {
 		// line comment
 		ch = s.next()
 		for ch != '\n' && ch >= 0 {
diff --git a/scanner/scanner_test.go b/scanner/scanner_test.go
index 7081320..2bbe534 100644
--- a/scanner/scanner_test.go
+++ b/scanner/scanner_test.go
@@ -42,11 +42,12 @@ func testTokenList(t *testing.T, tokenList []tokenPair) {
 
 func TestComment(t *testing.T) {
 	var tokenList = []tokenPair{
-		// {token.COMMENT, "//"},
-		// {token.COMMENT, "////"},
-		// {token.COMMENT, "// comment"},
-		// {token.COMMENT, "// /* comment */"},
-		// {token.COMMENT, "// // comment //"},
+		{token.COMMENT, "//"},
+		{token.COMMENT, "////"},
+		{token.COMMENT, "// comment"},
+		{token.COMMENT, "// /* comment */"},
+		{token.COMMENT, "// // comment //"},
+		{token.COMMENT, "//" + f100},
 		{token.COMMENT, "#"},
 		{token.COMMENT, "##"},
 		{token.COMMENT, "# comment"},