Python complex() method
The complex() method returns a complex number for the provided real value and imaginary*1j value, or converts a string or number to a complex number.
Syntax:
complex(real, imaginary)
complex(string)Parameters:
- real: (Optional) A number. Default is 0.
- imaginary: (Optional) A number that will be multiply with
1j. Default is 0. - string: (Optional) If the string is passed as arguement, the string is converted to the complex number.
Return Value:
Returns a complex number.
The following example converts the real numbers and imaginary numbers into complex numbers.
Example: complex()
cnum = complex()
print(cnum)
print(type(cnum)) # complex
cnum = complex(2, 5)
print(cnum)
cnum = complex(5)
print(cnum)
cnum = complex(-5)
print(cnum)
Output
0j
<class 'complex'>
(2+5j)
(5+0j)
(-5+0j)Note that the type of return value is 'complex'.
The following converts strings into complex numbers using the complex() method.
Example:
cnum = complex('5-3j')
print(cnum)
cnum = complex('3+j')
print(cnum)
complex('3')
print(cnum)
complex('+j')
print(cnum)
complex('-j')
print(cnum)
Output
(5-3j)
(3+1j)
(3+0j)
1j
-1j