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2.3 Built-in functions
A built-in function is composed of an identifier followed by a pair of parentheses containing an expression-list (the list of its arguments)(4). Here is the list of the built-in functions currently implemented:
build-in-function:
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Acos ( expression )
Arc cosine (inverse cosine) of an expression in [-1,1]. Returns a value in [0,Pi].
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Asin ( expression )
Arc sine (inverse sine) of an expression in [-1,1]. Returns a value in [-Pi/2,Pi/2].
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Atan ( expression )
Arc tangent (inverse tangent) of expression. Returns a value in [-Pi/2,Pi/2].
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Atan2 ( expression, expression )
Arc tangent (inverse tangent) of the first expression divided by the second. Returns a value in [-Pi,Pi].
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Ceil ( expression )
Rounds expression up to the nearest integer.
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Cos ( expression )
Cosine of expression.
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Cosh ( expression )
Hyperbolic cosine of expression.
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Exp ( expression )
Returns the value of e (the base of natural logarithms) raised to the power of expression.
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Fabs ( expression )
Absolute value of expression.
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Fmod ( expression, expression )
Remainder of the division of the first expression by the second, with the sign of the first.
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Floor ( expression )
Rounds expression down to the nearest integer.
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Hypot ( expression, expression )
Returns the square root of the sum of the square of its two arguments.
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Log ( expression )
Natural logarithm of expression (expression > 0).
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Log10 ( expression )
Base 10 logarithm of expression (expression > 0).
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Modulo ( expression, expression )
see
Fmod( expression, expression )
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Rand ( expression )
Random number between zero and expression.
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Sqrt ( expression )
Square root of expression (expression >= 0).
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Sin ( expression )
Sine of expression.
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Sinh ( expression )
Hyperbolic sine of expression.
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Tan ( expression )
Tangent of expression.
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Tanh ( expression )
Hyperbolic tangent of expression.
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