{
    "type": "Program",
    "statements": [
        {
            "FunctionStatement": {
                "type": "FunctionStatement",
                "name": {
                    "type": "IdentifierLiteral",
                    "value": "main"
                },
                "return_type": "Int",
                "parameters": [],
                "body": {
                    "type": "BlockStatement",
                    "statements": [
                        {
                            "type": "ForStatement",
                            "var_declaration": {
                                "type": "AssignmentStatement",
                                "name": {
                                    "type": "IdentifierLiteral",
                                    "value": "x"
                                },
                                "value": {
                                    "type": "IntegerLiteral",
                                    "value": 1
                                },
                                "value_type": "Int"
                            },
                            "condition": {
                                "type": "InfixExpression",
                                "left_node": {
                                    "type": "IdentifierLiteral",
                                    "value": "x"
                                },
                                "operator": "<=",
                                "right_node": {
                                    "type": "IntegerLiteral",
                                    "value": 20
                                }
                            },
                            "body": {
                                "type": "BlockStatement",
                                "statements": [
                                    {
                                        "type": "ExpressionStatement",
                                        "expr": {
                                            "type": "CallExpression",
                                            "function": {
                                                "type": "IdentifierLiteral",
                                                "value": "print"
                                            },
                                            "arguments": [
                                                {
                                                    "type": "StringLiteral",
                                                    "value": "i = %i\\n"
                                                },
                                                {
                                                    "type": "IdentifierLiteral",
                                                    "value": "x"
                                                }
                                            ]
                                        }
                                    }
                                ]
                            }
                        },
                        {
                            "type": "ReturnStatement",
                            "return_value": {
                                "type": "IdentifierLiteral",
                                "value": "x"
                            }
                        }
                    ]
                }
            }
        }
    ]
}