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Python: Find the largest negative and smallest positive numbers

Python Programming Puzzles: Exercise-79 with Solution

Write a Python program to find the largest negative and smallest positive numbers (or 0 if none).

Input:  
[-12, -6, 300, -40, 2, 2, 3, 57, -50, -22, 12, 40, 9, 11, 18]
Output:
[-6, 2]

Input: 
[-1, -2, -3, -4]
Output:
[-1, 0]

Input: 
[1, 2, 3, 4]
Output:
[0, 1]

Input: 
[]
Output:
[0, 0]

Pictorial Presentation:

Python: Find the largest negative and smallest positive numbers.

Sample Solution:

Python Code:

#License: https://bit.ly/3oLErEI

def test(nums):
    pos = [n for n in nums if n > 0]
    neg = [n for n in nums if n < 0]
    return [max(neg) if neg else 0, min(pos) if pos else 0]   
nums=[-12, -6, 300, -40, 2, 2, 3, 57, -50, -22, 12, 40, 9, 11, 18]
print("List of numbers:",nums)
print("Largest negative and smallest positive numbers (or 0 if none) of the said list:")
print(test(nums))
nums=[-1, -2, -3, -4]
print("\nList of numbers:",nums)
print("Largest negative and smallest positive numbers (or 0 if none) of the said list:")
print(test(nums))
nums=[1, 2, 3, 4]
print("\nList of numbers:",nums)
print("Largest negative and smallest positive numbers (or 0 if none) of the said list:")
print(test(nums))
nums=[]
print("\nList of numbers:",nums)
print("Largest negative and smallest positive numbers (or 0 if none) of the said list:")
print(test(nums)) 

Sample Output:

List of numbers: [-12, -6, 300, -40, 2, 2, 3, 57, -50, -22, 12, 40, 9, 11, 18]
Largest negative and smallest positive numbers (or 0 if none) of the said list:
[-6, 2]

List of numbers: [-1, -2, -3, -4]
Largest negative and smallest positive numbers (or 0 if none) of the said list:
[-1, 0]

List of numbers: [1, 2, 3, 4]
Largest negative and smallest positive numbers (or 0 if none) of the said list:
[0, 1]

List of numbers: []
Largest negative and smallest positive numbers (or 0 if none) of the said list:
[0, 0]

Flowchart:

Flowchart: Python - Find the largest negative and smallest positive numbers.

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: Find the two closest distinct numbers in a given a list of numbers.
Next: Round each float in a list of numbers up to the next integer and return the running total of the integer squares.

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Python: Tips of the Day

Clamps num within the inclusive range specified by the boundary values x and y:

Example:

def tips_clamp_num(num,x,y):
  return max(min(num, max(x, y)), min(x, y))
print(tips_clamp_num(2, 4, 6))
print(tips_clamp_num(1, -1, -6))

Output:

4
-1