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Python: Generate and print a list of first and last 5 elements where the values are square of numbers between two numbers

Python List: Exercise - 16 with Solution

Write a Python program to generate and print a list of first and last 5 elements where the values are square of numbers between 1 and 30 (both included).

Example - 1 :

Python: Generate and print a list of first and last 5 elements where the values are square of numbers between two numbers

Example - 2 :

Python: Generate and print a list of first and last 5 elements where the values are square of numbers between two numbers

Example - 3 :

Python: Generate and print a list of first and last 5 elements where the values are square of numbers between two numbers

Sample Solution:-

Python Code:

def printValues():
	l = list()
	for i in range(1,21):
		l.append(i**2)
	print(l[:5])
	print(l[-5:])

printValues()

Sample Output: 

[1, 4, 9, 16, 25]                                                                                             
[256, 289, 324, 361, 400

Flowchart:

Flowchart: Generate and print a list of first and last 5 elements where the values are square of numbers between two numbers

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Next: Write a Python program to generate and print a list except for the first 5 elements, where the values are square of numbers between 1 and 30 (both included).

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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