Python: Sum of two lowest negative numbers of a given array of integers
Python List: Exercise - 213 with Solution
Write a Python program to calculate the sum of two lowest negative numbers of a given array of integers.
An integer (from the Latin integer meaning "whole") is colloquially defined as a number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers.
Sample Solution-1:
Python Code:
def test(nums):
result = sorted([item for item in nums if item < 0])
return result[0]+result[1]
nums = [-14, 15, -10, -11, -12, -13, 16, 17, 18, 19, 20]
print("Original list elements:")
print(nums)
print("Sum of two lowest negative numbers of the said array of integers: ",test(nums))
nums = [-4, 5, -2, 0, 3, -1, 4 , 9]
print("\nOriginal list elements:")
print(nums)
print("Sum of two lowest negative numbers of the said array of integers: ",test(nums))
Sample Output:
Original list elements: [-14, 15, -10, -11, -12, -13, 16, 17, 18, 19, 20] Sum of two lowest negative numbers of the said array of integers: -27 Original list elements: [-4, 5, -2, 0, 3, -1, 4, 9] Sum of two lowest negative numbers of the said array of integers: -6
Flowchart:
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:
Python Code:
def test(nums):
return sum([el for el in sorted(nums) if el < 0][:2])
nums = [-14, 15, -10, -11, -12, -13, 16, 17, 18, 19, 20]
print("Original list elements:")
print(nums)
print("Sum of two lowest negative numbers of the said array of integers: ",test(nums))
nums = [-4, 5, -2, 0, 3, -1, 4 , 9]
print("\nOriginal list elements:")
print(nums)
print("Sum of two lowest negative numbers of the said array of integers: ",test(nums))
Sample Output:
Original list elements: [-14, 15, -10, -11, -12, -13, 16, 17, 18, 19, 20] Sum of two lowest negative numbers of the said array of integers: -27 Original list elements: [-4, 5, -2, 0, 3, -1, 4, 9] Sum of two lowest negative numbers of the said array of integers: -6
Flowchart:
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 program to remove all the values except integer values from a given array of mixed values.
Next: Write a Python program to sort a given positive number in descending/ascending order.
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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
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