However, in most cases, float and double seem to be interchangeable, i.e Using one or the other does not seem to affec. L specifies that a following a, a, e, e, f, f, g, or g conversion specifier applies to a long double argument The same rules specified for fprintf apply for printf, sprintf and similar functions. The 53 bits of double s give about 16 digits of precision The 24 bits of float s give about 7 digits of precision.
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? Double d = ((double) num) / denom But is there another way to get the correct double result I don't like casting primitives, who knows what may happen. 494 a double is not an integer, so the cast won't work
Also note that a double is a number, so it has the method intvalue, which you can use to get the value as a primitive int. There are two main differences from double 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? Long double vs double i am unable to understand the difference between between long double and double in c and c++ 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 people have mentioned performance isssues That would be exactly last on my list of considerations Correctness should be your #1 consideration.
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