basic for loop + examples -> era3

core/lexer.go

@@ -57,6 +57,8 @@ const (
 	TokenElse
 	TokenImport
 	TokenType
+	TokenFor
+	TokenIn
 
 	TokenComma
 	TokenDot
@@ -178,6 +180,10 @@ func (t TokenKind) String() string {
 		return "newline"
 	case TokenType:
 		return "type"
+	case TokenFor:
+		return "for"
+	case TokenIn:
+		return "in"
 	}
 
 	panic("UNDEFINED TOKENTYPE STRING CONVERSION")
@@ -196,6 +202,8 @@ var Keywords = map[string]TokenKind{
 	"while":      TokenWhile,
 	"breakpoint": TokenBreakpoint,
 	"type":       TokenType,
+	"for":        TokenFor,
+	"in":         TokenIn,
 }
 
 type Lexer struct {