Python complex()
Python complex() builtin function returns a complex number formed by the given real and imaginary parts.
In this tutorial, we will learn about the syntax of Python complex() function, and learn how to use this function with the help of examples.
Syntax
The syntax of complex() function is
complex([real[, imag]])
where
| Parameter | Required/Optional | Description |
|---|---|---|
| real | Optional | Any number. This is the real part of the resulting complex number. |
| imag | Optional | Any number. This is the imaginary part of the resulting complex number. |
complex() returns 0j.
complex(real) returns real+0j.
complex(str) converts the string into complex number. If string is passed as argument to complex(), then imag part should not be specified.
Returns
The function returns object of type complex.
Examples
1. complex(3, 5)
In this example, we will create a complex number formed by the real number 3 and imaginary number 5.
Python Program
real = 3 imag = 5 complex1 = complex(real, imag) print(complex1)Try Online
Output
(3+5j)
2. complex() – No arguments
In this example, we will not pass any real number and imaginary number to complex() function.
Python Program
complex1 = complex() print(complex1)Try Online
Output
0j
3. complex(3) – Only real value
In this example, we will create a complex number formed by the real number 3 and no value for imaginary parameter.
Python Program
real = 3 complex1 = complex(real) print(complex1)Try Online
Output
(3+0j)
4. complex(‘3+5j’) – Real and Complex parts
In this example, we will give a string to complex() function. The function interprets the given number as complex number.
Python Program
string = '3+5j' complex1 = complex(string) print(complex1)Try Online
Output
(3+5j)
Conclusion
In this Python Tutorial, we have learnt the syntax of Python complex() builtin function, and also learned how to use this function, with the help of Python example programs.