{"choices":[{"finish_reason":"length","index":0,"logprobs":null,"message":{"annotations":null,"audio":null,"content":"**Short answer:**  \nThe “Hello, World!” program first appeared in print in Brian Kernighan’s 1972 tutorial **“A Tutorial Introduction to the Language B.”** It was later cemented as the canonical first‑program example in the 1978 book **_The C Programming Language_** (Kernighan & Ritchie). From there it spread to virtually every programming language and became the de‑facto rite‑of‑passage for beginners.\n\n---\n\n### A brief timeline\n\n| Year | Publication / Event | What appeared |\n|------|---------------------|----------------|\n| **1972** | *A Tutorial Introduction to the Language B* (Kernighan) | A tiny B program that prints `Hello, world!` – the earliest known printed use of that exact phrase. |\n| **1978** | *The C Programming Language* (Kernighan & Ritchie, 2nd ed.) | The now‑familiar C version:<br>`printf(\"Hello, world!\\n\");` |\n| **Early‑80s** | Textbooks, manuals, and early UNIX documentation | The example is copied verbatim for C, Pascal, Ada, etc. |\n| **Mid‑80s onward** | Introductory tutorials, “Hello, World!” web pages, IDE sample projects | The phrase becomes a cultural meme in the programming world. |\n\n---\n\n### Why “Hello, World!”","function_call":null,"reasoning":"We need to answer the question: origin of phrase \"Hello, World\". Provide concise but thorough answer: early use in 1972? Actually first known use is in Brian Kernighan's 1972 C tutorial \"A Tutorial Introduction to the Language B\" (1972) and later in \"The C Programming Language\" book (1978). Also earlier in 1967? There is a 1967 example in \"The first known example is in 1967's \"The IBM 704/7090 computer system\" manual? Let's recall: The phrase appears in the 1972 book \"A Tutorial Introduction to the Language B\" by Kernighan, which included a program printing \"Hello, world\". Then the phrase became standard as the first program for teaching languages. Also earlier in 1970's? There is a 1970 example in \"The C Programming Language\" by Kernighan and Ritchie (1978). Also earlier in 1971? Actually the phrase appears in the 1974 book \"The C Programming Language\" prelude? No.\n\nAlso earlier: In 1967, \"The first computer program to output 'Hello, world!'\" appears in the 1967 \"The first computer to display a greeting\"? I've read that the phrase \"Hello, World!\" was used in 1965 in the \"The JOSS language\"? Not sure.\n\nLet's research mental memory: The phrase \"Hello, World!\" appears in the 1970 \"The C Programming Language\" but the earliest known use is in the 1972 \"A Tutorial Introduction to the Language B\" by Kernighan. The B language is predecessor to C. The program was:\n\n```\nmain() {\n    extrn putchar();\n    putchar('h'); putchar('e'); putchar('l'); putchar('l'); putchar('o');\n    putchar(',');\n    putchar(' ');\n    putchar('w'); putchar('o'); putchar('r'); putchar('l'); putchar('d');\n    putchar('!');\n    }\n```\n\nLater, the phrase appears in the 1978 book \"The C Programming Language\" (K&R) as:\n\n```\n#include <stdio.h>\nint main(void) {\n    printf(\"Hello, world!\\n\");\n    return 0;\n}\n```\n\nThus the phrase became a tradition for introductory programs. Also note that \"Hello, World!\" appears earlier in the 1967 \"The first computer program to output 'Hello, world!'\" in the book \"The Manual for the IBM 704/7090\"? There is a mention that the phrase appears in the 1960s \"The early use of 'Hello, world' in the 1960s by the BBN's \"B\" language\"? Actually, there is a 1975 \"The first known use of Hello, World in a published program was in the 1972 book 'A Tutorial Introduction to the Language B' by Brian Kernighan.\"\n\nThus answer: origin from Kernighan's B tutorial, popularized by the K&R C book, then widely used across many languages.\n\nWe can also mention that the phrase is a simple greeting, chosen for its simplicity and readability, and the tradition of the first program is to test that the language environment works.\n\nWe should also note that the phrase appears in the 1975 \"The first printed example of Hello, World! in the C manual for the PDP-11\".\n\nWill answer concisely.\n\n","reasoning_content":"We need to answer the question: origin of phrase \"Hello, World\". Provide concise but thorough answer: early use in 1972? Actually first known use is in Brian Kernighan's 1972 C tutorial \"A Tutorial Introduction to the Language B\" (1972) and later in \"The C Programming Language\" book (1978). Also earlier in 1967? There is a 1967 example in \"The first known example is in 1967's \"The IBM 704/7090 computer system\" manual? Let's recall: The phrase appears in the 1972 book \"A Tutorial Introduction to the Language B\" by Kernighan, which included a program printing \"Hello, world\". Then the phrase became standard as the first program for teaching languages. Also earlier in 1970's? There is a 1970 example in \"The C Programming Language\" by Kernighan and Ritchie (1978). Also earlier in 1971? Actually the phrase appears in the 1974 book \"The C Programming Language\" prelude? No.\n\nAlso earlier: In 1967, \"The first computer program to output 'Hello, world!'\" appears in the 1967 \"The first computer to display a greeting\"? I've read that the phrase \"Hello, World!\" was used in 1965 in the \"The JOSS language\"? Not sure.\n\nLet's research mental memory: The phrase \"Hello, World!\" appears in the 1970 \"The C Programming Language\" but the earliest known use is in the 1972 \"A Tutorial Introduction to the Language B\" by Kernighan. The B language is predecessor to C. The program was:\n\n```\nmain() {\n    extrn putchar();\n    putchar('h'); putchar('e'); putchar('l'); putchar('l'); putchar('o');\n    putchar(',');\n    putchar(' ');\n    putchar('w'); putchar('o'); putchar('r'); putchar('l'); putchar('d');\n    putchar('!');\n    }\n```\n\nLater, the phrase appears in the 1978 book \"The C Programming Language\" (K&R) as:\n\n```\n#include <stdio.h>\nint main(void) {\n    printf(\"Hello, world!\\n\");\n    return 0;\n}\n```\n\nThus the phrase became a tradition for introductory programs. Also note that \"Hello, World!\" appears earlier in the 1967 \"The first computer program to output 'Hello, world!'\" in the book \"The Manual for the IBM 704/7090\"? There is a mention that the phrase appears in the 1960s \"The early use of 'Hello, world' in the 1960s by the BBN's \"B\" language\"? Actually, there is a 1975 \"The first known use of Hello, World in a published program was in the 1972 book 'A Tutorial Introduction to the Language B' by Brian Kernighan.\"\n\nThus answer: origin from Kernighan's B tutorial, popularized by the K&R C book, then widely used across many languages.\n\nWe can also mention that the phrase is a simple greeting, chosen for its simplicity and readability, and the tradition of the first program is to test that the language environment works.\n\nWe should also note that the phrase appears in the 1975 \"The first printed example of Hello, World! in the C manual for the PDP-11\".\n\nWill answer concisely.\n\n","refusal":null,"role":"assistant"},"routed_experts":null,"stop_reason":null,"token_ids":null}],"created":1787368825,"ec_transfer_params":null,"id":"chatcmpl-f1460ee5-fa01-4ab0-bd3c-f2ae721e7321","kv_transfer_params":null,"metrics":null,"model":"@cf/openai/gpt-oss-120b","object":"chat.completion","prompt_logprobs":null,"prompt_text":null,"prompt_token_ids":null,"service_tier":null,"usage":{"prompt_tokens":84,"completion_tokens":1024,"total_tokens":1108,"prompt_tokens_details":{"cached_tokens":0},"neurons":72.49087524414062}}