Web Reference: Sep 16, 2023 · When used in an expression out > setprecision(n), sets the precision parameter of the stream out or in to exactly n. Behaves as if member precision were called with n as argument on the stream on which it is inserted/extracted as a manipulator (it can be inserted/extracted on input streams or output streams). Jul 23, 2025 · In C++, we have a std::setprecision function which is a part of the library. It is used to set the number of decimal places to be displayed for a floating-point number.
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