gm2-libs-iso/RealMath (The GNU Modula-2 Compiler)

#### 4.4.43 gm2-libs-iso/RealMath ¶

    DEFINITION MODULE RealMath;

      (* Mathematical functions for the type REAL *)

    CONST
      pi   = 3.1415926535897932384626433832795028841972;
      exp1 = 2.7182818284590452353602874713526624977572;

    PROCEDURE __BUILTIN__ sqrt (x: REAL): REAL;
      (* Returns the positive square root of x *)

    PROCEDURE __BUILTIN__ exp (x: REAL): REAL;
      (* Returns the exponential of x *)

    PROCEDURE __BUILTIN__ ln (x: REAL): REAL;
      (* Returns the natural logarithm of x *)

      (* The angle in all trigonometric functions is measured in radians *)

    PROCEDURE __BUILTIN__ sin (x: REAL): REAL;
      (* Returns the sine of x *)

    PROCEDURE __BUILTIN__ cos (x: REAL): REAL;
      (* Returns the cosine of x *)

    PROCEDURE tan (x: REAL): REAL;
      (* Returns the tangent of x *)

    PROCEDURE arcsin (x: REAL): REAL;
      (* Returns the arcsine of x *)

    PROCEDURE arccos (x: REAL): REAL;
      (* Returns the arccosine of x *)

    PROCEDURE arctan (x: REAL): REAL;
      (* Returns the arctangent of x *)

    PROCEDURE power (base, exponent: REAL) : REAL;
      (* Returns the value of the number base raised to the power exponent *)

    PROCEDURE round (x: REAL) : INTEGER;
      (* Returns the value of x rounded to the nearest integer *)

    PROCEDURE IsRMathException () : BOOLEAN;
      (* Returns TRUE if the current coroutine is in the exceptional execution state
         because of the raising of an exception in a routine from this module; otherwise
         returns FALSE.
      *)

    END RealMath.