DocumentationMathematicaThe Mathematica BookA Practical Introduction to MathematicaNumerical Calculations
1.1.5 Complex Numbers
You 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 .
This gives the ratio of two complex numbers.
In:= (4 + 3 I) / (2 - I)
Here is the numerical value of a complex exponential.
In:= Exp[2 + 9 I] //N
Complex number operations.