> ## Documentation Index > Fetch the complete documentation index at: https://docs.atlanta.gg/llms.txt > Use this file to discover all available pages before exploring further. # Constants > A comprehensive reference table listing all C++ constant macros and their equivalent values available for use within the Lua environment. *** ## Access All C++ constants are exposed to your Lua script via a single global table named **`constants`**. You access individual values by using the dot (`.`) or bracket (`[]`) operator on this table. ```lua Constant Usage Example theme={null} local uint64_max_constant = constants.uint64_max; -- Dot Operator local float_max_constant = constants["flt_max"]; -- Bracket Operator ``` *** ## Members This section lists all available **C++ constants and macro equivalents** exposed within the global **`constants`** table. These members provide fixed numerical values, such as maximum/minimum limits for various integer and floating-point types. *** ### Integers This section lists all available integer-based C++ constant macros. The minimum signed 8-bit integer value. The minimum signed 16-bit integer value. The minimum signed 32-bit integer value. The minimum signed 64-bit integer value. The maximum signed 8-bit integer value. The maximum signed 16-bit integer value. The maximum signed 32-bit integer value. The maximum signed 64-bit integer value. The maximum unsigned 8-bit integer value. The maximum unsigned 16-bit integer value. The maximum unsigned 32-bit integer value. The maximum unsigned 64-bit integer value. ### Doubles This section lists all available double-precision floating-point C++ constant macros. The number of decimal digits of precision. The number of significant decimal digits. The difference between $1$ and the least value greater than $1$ that is representable in the double format. Indicates the presence of subnormal values (often $1$ for present, $0$ for absent). The number of base $B$ digits in the mantissa. The maximum finite representable double-precision floating-point number. The maximum integer such that $10$ raised to this power is representable. The maximum binary exponent such that $2$ raised to this power is representable. The minimum positive normalized double-precision floating-point number. The minimum integer such that $10$ raised to this power is a normalized number. The minimum binary exponent such that $2$ raised to this power is a normalized number. The base of the exponent (usually $2$). The minimum positive unnormalized (subnormal) double-precision floating-point number. ### Floats This section lists all available single-precision floating-point C++ constant macros. The number of decimal digits of precision. The number of significant decimal digits. The difference between $1$ and the least value greater than $1$ that is representable in the float format. Indicates the presence of subnormal values (often $1$ for present, $0$ for absent). The number of base $B$ digits in the mantissa. The maximum finite representable single-precision floating-point number. The maximum integer such that $10$ raised to this power is representable. The maximum binary exponent such that $2$ raised to this power is representable. The minimum positive normalized single-precision floating-point number. The minimum integer such that $10$ raised to this power is a normalized number. The minimum binary exponent such that $2$ raised to this power is a normalized number. The base of the exponent (usually $2$). The minimum positive unnormalized (subnormal) single-precision floating-point number.