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Python Exercise: Check whether a number falls in a given range

Python Functions: Exercise-6 with Solution

Write a Python function to check whether a number falls in a given range.

Sample Solution-1:

Python Code:

def test_range(n):
    if n in range(3,9):
        print( " %s is in the range"%str(n))
    else :
        print("The number is outside the given range.")
test_range(5)

Sample Output:

 5 is in the range
 

Pictorial presentation:

Python exercises: Check whether a number falls in a given range.

Flowchart:

Flowchart: Python exercises: Check whether a number falls in a given range.

Visualize Python code execution:

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


Sample Solution-2:

  • Use arithmetic comparison to check if the given number is in the specified range.
  • If the second parameter, end, is not specified, the range is considered to be from 0 to start.

Python Code:

def test_range(n, start_num, end_num = 0):
  return start_num <= n <= end_num if end_num >= start_num else end_num <= n <= start_num
print(test_range(5, 2, 7))
print(test_range(5, 7))
print(test_range(1, 3, 6))
print(test_range(6, 5))

Sample Output:

True
True
False
False
 

Flowchart:

Flowchart: Python exercises: Check whether a number falls in a given range.

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:

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Previous: Write a Python function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument.
Next: Write a Python function that accepts a string and calculate the number of upper case letters and lower case letters.

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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