For the latest documentation on Visual Studio 2017, see Visual Studio 2017 Documentation.
The following table lists the limits on the values of floating-point constants. These limits are also defined in the standard header file FLOAT.H.
|FLT_DIG DBL_DIG LDBL_DIG||Number of digits, q, such that a floating-point number with q decimal digits can be rounded into a floating-point representation and back without loss of precision.||6 15 15|
|FLT_EPSILON DBL_EPSILON LDBL_EPSILON||Smallest positive number x, such that x + 1.0 is not equal to 1.0.||1.192092896e–07F 2.2204460492503131e–016 2.2204460492503131e–016|
|FLT_MANT_DIG DBL_MANT_DIG LDBL_MANT_DIG||Number of digits in the radix specified by FLT_RADIX in the floating-point significand. The radix is 2; hence these values specify bits.||24 53 53|
|FLT_MAX DBL_MAX LDBL_MAX||Maximum representable floating-point number.||3.402823466e+38F 1.7976931348623158e+308 1.7976931348623158e+308|
|FLT_MAX_10_EXP DBL_MAX_10_EXP LDBL_MAX_10_EXP||Maximum integer such that 10 raised to that number is a representable floating-point number.||38 308 308|
|FLT_MAX_EXP DBL_MAX_EXP LDBL_MAX_EXP||Maximum integer such that FLT_RADIX raised to that number is a representable floating- point number.||128 1024 1024|
|FLT_MIN DBL_MIN LDBL_MIN||Minimum positive value.||1.175494351e–38F 2.2250738585072014e–308 2.2250738585072014e–308|
|FLT_MIN_10_EXP DBL_MIN_10_EXP LDBL_MIN_10_EXP||Minimum negative integer such that 10 raised to that number is a representable floating- point number.||–37|
|FLT_MIN_EXP DBL_MIN_EXP LDBL_MIN_EXP||Minimum negative integer such that FLT_RADIX raised to that number is a representable floating-point number.||–125|
|FLT_RADIX _DBL_RADIX _LDBL_RADIX||Radix of exponent representation.||2 2 2|
|FLT_ROUNDS _DBL_ROUNDS _LDBL_ROUNDS||Rounding mode for floating-point addition.||1 (near) 1 (near) 1 (near)|
The information in the table may differ in future versions of the product.