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>
Also Read: