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What is the usage of the keyword ?? in R?

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What is the usage of the keyword ?? in R? (a) Help window (b) Extensive search (c) Error correction (d) Error detection The question was asked in homework. My doubt stems from Getting Started with R in division Sockets of JavaScript Select the correct answer from above options JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

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Right answer is (b) Extensive search The explanation: The ?? function scans the documentation for packages installed in your library. ?? (keyword) is generally used for a more extensive search when compared to the keyword ?.

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