Arithmetic Operators and Functions
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Operators
+   Addition   
-   Subtraction   
*   Multiplication   
/   Real division   
div   Integer division   
mod   Remainder   

Comparisons
<   less   
<=   less or equal   
=   equal   
>=   greater or equal   
>   greater   
less   less   
is   equal   
greater   greater   
<>   not equal   
from...upto   range   

Functions
Abs(X: Double): DoubleReturns the absolute value of the argument, X.     
ArcTan(X: Double): DoubleReturns the arctangent of a given Double X.     
Cos(X: Double): DoubleReturns the cosine of the angle X, in radians.     
Exp(X: Double): DoubleReturns the value of e raised to the power of X, where e is the base of the natural logarithms.     
Frac(X: Double): DoubleReturns the fractional part of the argument X.     
Int(X: Double): DoubleReturns the integer part of X, that is, X rounded toward zero.     
Log(X: Double): DoubleReturns the natural log of a real expression.     
Round(X: Double): DoubleReturns the value of X rounded to the nearest whole Double.     
Sin(X: Double): DoubleReturns the sine of the angle in radians.     
Sqrt(X: Double): DoubleReturns the square root of X.