Limits on Floating-Point Constants
Microsoft Specific
Limits on the values of floating-point constants are given in the following table. The header file FLOAT.H contains this information.
Limits on Floating-Point Constants
Constant |
Meaning |
Value |
|---|---|---|
FLT_DIGDBL_DIGLDBL_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_EPSILONDBL_EPSILONLDBL_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_GUARD |
|
0 |
FLT_MANT_DIGDBL_MANT_DIGLDBL_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_MAXDBL_MAXLDBL_MAX |
Maximum representable floating-point number. |
3.402823466e+38F 1.7976931348623158e+308 1.7976931348623158e+308 |
FLT_MAX_10_EXPDBL_MAX_10_EXPLDBL_MAX_10_EXP |
Maximum integer such that 10 raised to that number is a representable floating-point number. |
38 308 308 |
FLT_MAX_EXPDBL_MAX_EXPLDBL_MAX_EXP |
Maximum integer such that FLT_RADIX raised to that number is a representable floating-point number. |
128 1024 1024 |
FLT_MINDBL_MINLDBL_MIN |
Minimum positive value. |
1.175494351e–38F 2.2250738585072014e–308 2.2250738585072014e–308 |
FLT_MIN_10_EXPDBL_MIN_10_EXPLDBL_MIN_10_EXP |
Minimum negative integer such that 10 raised to that number is a representable floating-point number. |
–37 –307 –307 |
FLT_MIN_EXPDBL_MIN_EXPLDBL_MIN_EXP |
Minimum negative integer such that FLT_RADIX raised to that number is a representable floating-point number. |
–125 –1021 –1021 |
FLT_NORMALIZE |
|
0 |
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) |
Note that the information in the above table may differ in future implementations.
END Microsoft Specific