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 Challenges: Compute and return the square root of a given integer

Python Challenges - 1: Exercise-11 with Solution

Write a Python program to compute and return the square root of a given 'integer'.

Note: The returned value will be an ‘integer’.

Python: Square root

Sample Solution:-

Python Code:

def my_sqrt(x):
   if x<2: return x
   left=1
   right=int(x/2)+1
   while left<=right:
            mid=int((left+right)/2)
            if mid*mid==x:
                return mid
            if mid*mid>x:
                right=mid-1
            else:
                left=mid+1
   return right

print(my_sqrt(16))

Sample Output: 

4

Flowchart:

Python Flowchart: Compute and return the square root of an given 'integer'

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:

Python Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Python program to find three numbers from an array such that the sum of three numbers equal to a given number.
Next: Write a Python program to find the single number in a list that doesn't occur twice.

What is the difficulty level of this exercise?

Test your Programming 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