The syntax of complex() is:
complex([real[, imag]])
complex() Parameters
In general, complex() method takes two parameters:
- real - real part. If real is omitted, it defaults to 0.
- imag - imaginary part. If imag is omitted, it defaults to 0.
If the first parameter passed to this method is a string, it will be interpreted as a complex number. In this case, the second parameter shouldn't be passed.
Return Value from complex()
As suggested by the name, complex() method returns a complex number.
If the string passed to this method is not a valid complex number, ValueError exception is raised.
Note: The string passed to complex() should be in the form real+imagj or real+imagJ
Example 1: How to create a complex number in Python?
z = complex(2, -3) print(z) z = complex(1) print(z) z = complex() print(z) z = complex('5-9j') print(z) Output
(2-3j) (1+0j) 0j (5-9j)
Example 2: Create complex Number Without Using complex()
It's possible to create a complex number without using complex() method. For that, you have to put 'j' or 'J' after a number.
a = 2+3j print('a =',a) print('Type of a is',type(a)) b = -2j print('b =',b) print('Type of b is',type(a)) c = 0j print('c =',c) print('Type of c is',type(c)) Output
a = (2+3j) Type of a is <object> b = (-0-2j) Type of b is <object> c = 0j Type of c is <object>
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