# Floating Limits

Microsoft Specific

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>.

### Limits on Floating-Point Constants

Constant Meaning Value
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_GUARD 0
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

-307

-307
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

-1021

-1021
FLT_NORMALIZE 0