2.4.8.12 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 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.

Figure 2–21 contains examples of the use of #C.

  #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.                  

                  Figure 2–21: Complex Number Example                

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