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What is the difference between float and double? - Stack Overflow Type double, 64 bits long, has a bigger range (*10^+ -308) and 15 digits precision Type long double is nominally 80 bits, though a given compiler OS pairing may store it as 12-16 bytes for alignment purposes The long double has an exponent that just ridiculously huge and should have 19 digits precision
Difference between long double and double in C and C++ The standard only requires that long double is at least as precise as double, so some compilers will simply treat long double as if it is the same as double But, on most x86 chips, the 10-byte extended precision format 80-bit number is available through the CPU's floating-point unit, which provides even more precision than 64-bit double , with
Whats the difference between a single precision and double precision . . . The term double precision is something of a misnomer because the precision is not really double The word double derives from the fact that a double-precision number uses twice as many bits as a regular floating-point number For example, if a single-precision number requires 32 bits, its double-precision counterpart will be 64 bits long
How do I print a double value with full precision using cout? A double is a floating point type, not fixed point Do not use std::fixed as that fails to print small double as anything but 0 000 000 For large double, it prints many digits, perhaps hundreds of questionable informativeness
Correct format specifier for double in printf - Stack Overflow Format %lf is a perfectly correct printf format for double, exactly as you used it There's nothing wrong with your code There's nothing wrong with your code 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
Integer division: How do you produce a double? - Stack Overflow 1 double d = (double)5 20; 2 double v = (double)5 (double) 20; 3 double v = 5 (double) 20; Note that casting the result won't do it Because first division is done as per precedence rule double d = (double)(5 20); produces 0 0 I do not think there is any problem with casting as such you are thinking about