Introduction to the Python standard library built-in function complex, pythoncomplex

Introduction to the Python standard library built-in function complex, pythoncomplex

This function can create a plural number using the real + imag * j parameter. You can also convert the number of a string to the plural value, or convert a number to the plural value. If the first parameter is a string and the second parameter is not required, the string is interpreted and the plural value is returned. However, the second parameter cannot be entered as a string; otherwise, an error occurs. Real and imag parameters can enter numbers. If the imag parameter is not input, it is a zero value by default. This function is equivalent to the int () or float () function. If the real and imag parameters both input zero, this function returns 0j. With this function, you can easily convert a list into a complex number.

Note: When you want to convert a string from the plural form to the plural form, note that no space exists in the string, for example, complex ('1 + 2j '), instead of writing complex (1 + 2j '), otherwise, a ValueError exception is returned.

Example:

Copy codeThe Code is as follows:
# Complex ()

Print (complex (1 ))
Print (complex ('2 + 1j '))
Print (complex (2, 5 ))

L = [1, 3, 4, 5]
For I in l:
Print (complex (I, 5 ))

The output is as follows:

Copy codeThe Code is as follows:
(1 + 0j)

(2 + 1j)

(2 + 5j)

(1 + 5j)

(3 + 5j)

(4 + 5j)

(5 + 5j)