Python complex() Function

The Python complex() function returns a complex number with specified real part and imaginary part. It has one required parameter which is used to specify real part of the complex number and one optional parameter which is used to specify imaginary part of the complex number.

Syntax

complex(real, imaginary)

Parameters

Example:

In the example below, complex() function is used to create a complex number with specified real and imaginary parts.

MyNumber = complex(2)
print(MyNumber)

MyNumber = complex(2, 3)
print(MyNumber)

The output of the above code will be:

(2+0j)
(2+3j)

The complex() function is also used to convert an integer literal, a float literal and a string literal (provided the string represents a complex number).

Example:

In the example below, complex() function is used to convert an integer literal, a float literal and a string literal into a complex number.

MyInt = 10
MyNumber = complex(MyInt)
print(MyNumber)

MyFloat = 10.5
MyNumber = complex(MyFloat)
print(MyNumber)

MyString = '5'
MyNumber = complex(MyString)
print(MyNumber)

MyString = '5+5j'
MyNumber = complex(MyString)
print(MyNumber)

The output of the above code will be:

(10+0j)
(10.5+0j)
(5+0j)
(5+5j)