Python Program to Print Negative Numbers in a List

Negative numbers are a common element in data analysis and processing. In this blog post, we’ll explore a Python program that focuses on identifying and printing negative numbers within a given list. This program is not only practical for data manipulation but also serves as an excellent example for those learning Python programming.

Understanding the Problem

Given a list of numbers, the task is to identify and print the negative numbers present in that list. The program should efficiently iterate through the list, identify negative numbers, and output the result. We’ll use Python’s simple syntax and list processing capabilities to achieve this goal.

Python Program Code

Let’s dive into the Python code that accomplishes the task:

def print_negative_numbers(numbers):
    negative_numbers = [num for num in numbers if num < 0]
    return negative_numbers

# User input for the list of numbers
numbers = [int(x) for x in input("Enter the list of numbers (separated by space): ").split()]

# Get and print negative numbers
negative_numbers = print_negative_numbers(numbers)

# Display results
print("\nNegative Numbers in the List:", negative_numbers)

Program Output

Let’s consider an example where the user enters the numbers: 1, -5, 8, -12, 0, -7:

Enter the list of numbers (separated by space): 1 -5 8 -12 0 -7

Negative Numbers in the List: [-5, -12, -7]

Program Explanation

1. User Input: The program begins by taking user input for a list of numbers. The input is processed to create a Python list.

2. List Comprehension: The core logic of the program utilizes a list comprehension. It creates a new list (negative_numbers) that contains only the elements from the original list that are less than zero (negative numbers).

3. Result Display: Finally, the program displays the identified negative numbers to the user.

Conclusion

This Python program offers a practical solution for identifying and printing negative numbers within a list. It demonstrates the simplicity and readability of Python code, especially when dealing with list comprehensions and basic conditional statements.

Readers are encouraged to experiment with different input lists, explore variations of the program, and incorporate similar logic into their own Python projects. Understanding how to manipulate lists based on specific conditions is a valuable skill in various programming scenarios. Happy coding!