The parser supports the following functions:

Abs returns an absolute value.

function Abs(X: Number): Number;

For example, abs(-2) returns 2

Frac returns the fractional part of a real number.

function Frac(X: Number): Number;

For example, Frac(123.456) = 0.456

Int returns the integer part of a real number.

function Int(X: Number): Number;

For example, Int(123.456)=123.0

Random generates random numbers within a specified range.

function Random [ ( Range: Integer) ];

If Range is not specified, the result is a real-type random number
within the range 0 <= X < 1.

Round function rounds a real-type value to an integer-type value.

function Round(X: Number): Integer;

Returns the value of X rounded to the nearest whole number.

SQR returns the square of a number.

function Sqr(X: Number): Number;

SQRT returns the square root of X.

function Sqrt(X: Number): Number;

Exp returns the value of e raised to the power of X, where e is the
base of the natural logarithms.

function Exp(X: Number): Number;

Ln returns the natural log of a real expression (Ln(e) = 1)

function Ln(X: Number): Number;

Log returns the log of a real expression.

function Log(X: Number): Number;

Note that Log(X)=Ln(X)/Ln(10)

Power is a same that ^-operator.

function Power(X, Y: Number): Number;

For example, 2^3 raises 2 to 3 and returns 8

Div returns the value of x/y rounded in the direction of zero to the
nearest integer.

function Div(X, Y: Number): Integer;

Mod returns the remainder obtained by dividing its operands.

function Mod(X, Y: Number): Integer;

In other words, x mod y = x - (x div y) * y.

Percent returns the calculated percent from value (45%).

function Percent(X, Y: Number): Integer;

For example, Percent(130, 200) returns 65

Note that the runtime error occurs when y is zero in an expression
of the form x/y, x div y, or x mod y.