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  ANSI Common Lisp   2 Syntax   2.4 Standard Macro Characters   2.4.8 Sharpsign Sharpsign C

#C reads a following object, which must be a list of length two whose elements are both reals. These reals denote, respectively, the real and imaginary parts of a complex number. If the two parts as notated are not of the same data type, then they are converted according to the rules of floating-point contagion described in Section Contagion in Numeric Operations.

#C(real imag) is equivalent to #.(complex (quote real) (quote imag)), except that #C is not affected by *read-eval*. See the function complex.

The next figure contains examples of the use of #C.

Complex Number Example
#C(3.0s1 2.0s-1) ;A complex with small float parts.
#C(5 -3) ;A "Gaussian integer"
#C(5/3 7.0) ;Will be converted internally to #C(1.66666 7.0)
#C(0 1) ;The imaginary unit; that is, i.

For further information, see Section Printing Complexes and Section Syntax of a Complex.

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