1.1.5 Complex NumbersYou can enter complex numbers in Mathematica just by including the constant I, equal to  . Make sure that you type a capital I. If you are using notebooks, you can also enter I as  by typing  ii (see Section 1.1.7). The form  is normally what is used in output. Note that an ordinary i means a variable named  , not  . This gives the imaginary number result  . | |
Out[1]=
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| This gives the ratio of two complex numbers. | |
In[2]:=
(4 + 3 I) / (2 - I)
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Out[2]=
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| Here is the numerical value of a complex exponential. | |
Out[3]=
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| x + I y | the complex number  | | Re[z] | real part | | Im[z] | imaginary part | | Conjugate[z] | complex conjugate  or  | | Abs[z] | absolute value  | | Arg[z] | the argument  in  |
Complex number operations.
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