View source for cpp/language/implicit conversion

====Floating-point conversions====
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A {{rlps|value category#prvalue}} of a floating-point type can be converted to a prvalue of any other floating-point type.
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A {{rlps|value category#prvalue}} of a floating-point type can be converted to a prvalue of any other floating-point type with a greater or equal {{rlpsd|usual arithmetic conversions#Floating-point conversion rank}}.

A {{rlps|value category#prvalue}} of a standard floating-point type can be converted to a prvalue of any other standard floating-point type.

{{rlpt|static_cast}} can be used to explicitly convert a prvalue of floating-point type to any other floating-point type.
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If the conversion is listed under floating-point promotions, it is a promotion and not a conversion.
* If the source value can be represented exactly in the destination type, it does not change.
* If the source value is between two representable values of the destination type, the result is one of those two values (it is implementation-defined which one, although if IEEE arithmetic is supported, rounding defaults [[cpp/numeric/fenv/FE_round|to nearest]]).
* Otherwise, the behavior is undefined.