C standard library header file providing mathematical functions
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C mathematical operations are a group of functions in the standard library of the C programming language implementing basic mathematical functions.[1][2] All functions use floating-point numbers in one manner or another. Different C standards provide different, albeit backwards-compatible, sets of functions. Most of these functions are also available in the C++ standard library, though in different headers (the C headers are included as well, but only as a deprecated compatibility feature).
^ISO/IEC 9899:1999 specification(PDF). p. 212, § 7.12.
^Prata, Stephen (2004). C primer plus. Sams Publishing. Appendix B, Section V: The Standard ANSI C Library with C99 Additions. ISBN 0-672-32696-5.
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