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Python Math: Get the length and angle of a complex number

Python Math: Exercise-34 with Solution

Write a Python program to get the length and the angle of a complex number.

Sample Solution:-

Python Code:

import cmath
cn = complex(3,4)
#length of a complex number. 
print("Length of a complex number: ", abs(cn))
# gets angle. return in radians, between  [-π, π]
print("Complex number Angle: ",cmath.phase(0+1j) )

Sample Output: 

Length of a complex number:  5.0                                                                              
Complex number Angle:  1.5707963267948966

Flowchart:

Flowchart: Get the length and angle of a complex number

Python Code Editor:

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Previous: Write a Python program to add, subtract, multiply and division of two complex numbers.
Next: Write a Python program to convert Polar coordinates to rectangular coordinates.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m