Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

Python: pow() function

pow() function

The pow() function is used to get the value of x to the power of y (xy). If z is present, return x to the power y, modulo z (computed more efficiently than pow(x, y) % z).

Version:

(Python 3.2.5)

Syntax:

pow(x, y[, z])

Parameter:

Name Description Required /
Optional
x A number (the base) which is to be powered. Required
y A number (the exponent) which is to be powered with x. Required
z A number which is to be used for modulus operation. Optional

Example: Python pow() function

# positive a, positive b (a**b)
print(pow(4, 4))

# negative a, positive b
print(pow(-4, 4))

# positive a, negative b (a**-b)
print(pow(4, -4))

# negative a, negative b
print(pow(-4, -4))

Output:

256
256
0.00390625
0.00390625

Pictorial Presentation:

Python: Built-in-function - pow() function

Example: Python pow() with three arguments (x**y) % z

a = 3
b = 5
c = 7
print(pow(a, b, c))

Output:

5

Python Code Editor:

Previous: ord()
Next: print()

Test your Python skills with w3resource's quiz



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