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Course Overview
Python complex() Function
Python complex() function is used to convert numbers or string into a complex number. This method takes two optional parameters and returns a complex number. The first parameter is called a real and second as imaginary parts.
Signature
- complex ([real[, imaginary]])
Parameters
real: It is an optional numeric parameter.
imaginary: It is an optional numeric parameter.
Return
It returns a complex number.
Let’s see some examples of complex() function to understand it’s functionality.
Python complex() Function Example 1
It is a simple example which shows the usage of complex() function. Here, we are passing all the argument of integer type.
-
# Python complex() function example
# Calling function
a = complex(1) # Passing single parameter
b = complex(1,2) # Passing both parameters
# Displaying result
print(a)
print(b)
Output:
-
(1+0j)
(1+2j)
Python complex() Function Example 2
Here, we are passing float type values, and the output generated by the function is also float type.
-
# Python complex() function example
# Calling function
a = complex(1.5) # Passing single parameter
b = complex(1.5,2.2) # Passing both parameters
# Displaying result
print(a)
print(b)
Output:
-
(1.5+0j)
(1.5+2.2j)
Python complex() Function Example 3
It also allows string parameters but should be an integer value.
-
# Python complex() function example
# Calling function
a = complex(‘1’) # Passing single parameter
b = complex(‘1.5’)
# Displaying result
print(a)
print(b)
Output:
-
(1+0j)
(1.5+0j)
Python complex() Function Example 4
It allows only one string parameter. If the first argument is a string type, it does not allow to pass the second argument. It generates an error if we pass the second parameter.
-
# Python complex() function example
# Calling function
a = complex(‘1′,’2’) # Passing two parameter
# Displaying result
print(a)
Output:
- TypeError: complex() can’t take the second arg if first is a string
Python complex() Function Example 5
It also allows passing a complex number as a parameter. See the example below.
-
# Python complex() function example
# Calling function
a = complex(1+2j) # Passing single parameter
b = complex(1+2j,2+3j) # Passing both parameters
# Displaying result
print(a)
print(b)
Output:
-
(1+2j)
(-2+4j)
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