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Asked: 2026-06-11T18:11:10+00:00

Consider this example of type inference: auto var = 1.0 ; Does this evaluate

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Consider this example of type inference:

auto var = 1.0 ;

Does this evaluate to a float or double under C++11 type inference?, can this behaviour be controlled?

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  1. Editorial Team

    It will be evaluated as a double and yes, you can control it.

    In the standard ISO-14882:2011, 2.14.4 Floating literals, point 1:

    The type of a floating literal is double unless explicitly specified by a suffix. The suffixes f and F specify float, the suffixes l and L specify long double. If the scaled value is not in the range of representable values for its type, the program is ill-formed.

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