C++ : What exactly does '3.4E +/- 38 (7 digits)' mean?

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C++ : What exactly does '3.4E +/- 38 (7 digits)' mean?
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C++ : What exactly does '3.4E +/- 38 (7 digits)' mean?
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does C++ exactly +/- What : (7 mean? 38 '3.4E digits)'



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