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9.78 Exp

Synopsis

 
function Exp (x: Real): Real;
or
 
function Exp (z: Complex): Complex;

Description

The exponential function `Exp' computes the value of e to the power of x, where the Euler number e = Exp (1) is the base of the natural logarithm.

Conforming to

The function `Exp' is defined in ISO-7185 Pascal; its application to complex values is defined in ISO-10206 Extended Pascal.

Example

 
program ExpDemo;
var
  z: Complex;
begin
  z := Cmplx (1, - 2 * Pi);  { z = 1 - 2 pi i }
  z := Exp (z);  { yields e = Exp (1), since Exp ix = Cos x + i Sin x }
  WriteLn (Ln (Re (z)) : 0 : 5)  { prints 1 = Ln (Exp (1)) }
end.

See also

section 9.135 Ln



This document was generated by Frank Heckenbach on May, 10 2002 using texi2html