Dec 31, 2021 · I've read about the difference between double precision and single precision. However, in most cases, float and double seem to be interchangeable, i.e. using one or the …

The 53 bits of double s give about 16 digits of precision. The 24 bits of float s give about 7 digits of precision.

Format %lf in printf was not supported in old (pre-C99) versions of C language, which created superficial "inconsistency" between format specifiers for double in printf and scanf.

double num = 5; That avoids a cast. But you'll find that the cast conversions are well-defined. You don't have to guess, just check the JLS. int to double is a widening conversion. From §5.1.2: …

In my earlier question I was printing a double using cout that got rounded when I wasn't expecting it. How can I make cout print a double using full precision?

494 A Double is not an Integer, so the cast won't work. Note the difference between the Double class and the double primitive. Also note that a Double is a Number, so it has the method …

Jul 22, 2009 · When should I use double instead of decimal? has some similar and more in depth answers. Using double instead of decimal for monetary applications is a micro-optimization - …

A similar question for C/C++ (as this may be the top search engine hit): How can I get double quotes into a string literal?

Jul 2, 2009 · A double has a much higher precision due to it's difference in size. If the numbers you are using will commonly exceed the value of a float, then use a double. Several other …

The double "not" in this case is quite simple. It is simply two not s back to back. The first one simply "inverts" the truthy or falsy value, resulting in an actual Boolean type, and then the …