Mathematical Constants

Built-in Variable: I

Built-in Variable: J

Built-in Variable: i

Built-in Variable: j

A pure imaginary number, defined as The I and J forms are true constants, and cannot be modified. The i and j forms are like ordinary variables, and may be used for other purposes. However, unlike other variables, they once again assume their special predefined values if they are cleared See section Status of Variables.

Built-in Variable: Inf

Built-in Variable: inf

Infinity. This is the result of an operation like 1/0, or an operation that results in a floating point overflow.

Built-in Variable: NaN

Built-in Variable: nan

Not a number. This is the result of an operation like or any operation with a NaN.

Note that NaN always compares not equal to NaN. This behavior is specified by the IEEE standard for floating point arithmetic. To find NaN values, you must use the isnan function.

Built-in Variable: pi

The ratio of the circumference of a circle to its diameter. Internally, pi is computed as `4.0 * atan (1.0)'.

Built-in Variable: e

The base of natural logarithms. The constant satisfies the equation

Built-in Variable: eps

The machine precision. More precisely, eps is the largest relative spacing between any two adjacent numbers in the machine's floating point system. This number is obviously system-dependent. On machines that support 64 bit IEEE floating point arithmetic, eps is approximately

Built-in Variable: realmax

The largest floating point number that is representable. The actual value is system-dependent. On machines that support 64 bit IEEE floating point arithmetic, realmax is approximately

Built-in Variable: realmin

The smallest floating point number that is representable. The actual value is system-dependent. On machines that support 64 bit IEEE floating point arithmetic, realmin is approximately

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