Defined in header `<cmath>` | ||
---|---|---|

#define INFINITY /*implementation defined*/ | (since C++11) |

If the implementation supports floating-point infinities, the macro `INFINITY`

expands to constant expression of type `float`

which evaluates to positive or unsigned infinity.

If the implementation does not support floating-point infinities, the macro `INFINITY`

expands to a positive value that is guaranteed to overflow a `float`

at compile time, and the use of this macro generates a compiler warning.

(C++11) | checks if the given number is infinite (function) |

(C++11)(C++11) | indicates the overflow value for `float` , `double` and `long double` respectively (macro constant) |

[static] | identifies floating-point types that can represent the special value "positive infinity" (public static member constant of `std::numeric_limits<T>` ) |

[static] | returns the positive infinity value of the given floating-point type (public static member function of `std::numeric_limits<T>` ) |

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