# ?True/False The following script structure is valid according to Bitcoin grammar rules: ``` OP_1 OP_IF ``` False Note to learners: Every OP\_IF must have a corresponding OP\_ENDIF. This script is missing OP\_ENDIF and would be rejected as invalid. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://hub.bsvblockchain.org/higher-learning/bsv-academy/bsv-opcodes/if-conditionals/true-false-the-following-script-structure-is-valid-according-to-bitcoin-grammar-rules.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.