YouTipPython Func Complex
# Python2.x Python complex() Function
[ Python Built-in Functions](#)
* * *
## Description
The **complex()** function is used to create a complex number with the value `real + imag * j` or to convert a string or number to a complex number. If the first parameter is a string, the second parameter does not need to be specified.
## Syntax
complex syntax:
class complex([real[, imag]])
Parameter description:
* real -- int, long, float, or string;
* imag -- int, long, float;
## Return Value
Returns a complex number.
## Example
The following examples demonstrate the use of complex:
>>>complex(1, 2)(1 + 2j)>>>complex(1)# Number(1 + 0j)>>>complex("1")# Treated as a string(1 + 0j)# Note: There must be no spaces around the "+" sign here, so it cannot be written as "1 + 2j", it should be "1+2j", otherwise an error will occur>>>complex("1+2j")(1 + 2j)
[ Python Built-in Functions](#)