This Python program is designed to analyze a list of numbers and compute the sums of specific categories within that list. It categorizes the numbers into three groups: negative numbers, positive even numbers, and positive odd numbers. Subsequently, it calculates the sum for each category and prints out the results.

## Problem Statement

You are tasked with creating a Python program that performs analysis on a list of integers.

## Python Program to Print Sum of Negative Numbers, Positive Even & Odd Numbers in a List

def calculate_sums(numbers): sum_negative = 0 sum_even = 0 sum_odd = 0 for num in numbers: if num < 0: sum_negative += num elif num % 2 == 0: sum_even += num else: sum_odd += num return sum_negative, sum_even, sum_odd # Input list of numbers numbers = [12, -7, 5, 64, -14] # Calculate the sums sum_negative, sum_even, sum_odd = calculate_sums(numbers) # Print the results print("Sum of negative numbers:", sum_negative) print("Sum of positive even numbers:", sum_even) print("Sum of positive odd numbers:", sum_odd)

## How it works

The Python program provided calculates and prints the sum of negative numbers, positive even numbers, and positive odd numbers in a list. Hereâ€™s a step-by-step explanation of how it works:

**Define the**`calculate_sums`

Function:`def calculate_sums(numbers):`

- This function is defined to calculate the sums. It takes a list of integers (
`numbers`

) as input.

**Initialize Sum Variables:**`sum_negative = 0 sum_even = 0 sum_odd = 0`

- Three variables (
`sum_negative`

,`sum_even`

, and`sum_odd`

) are initialized to keep track of the sums for negative numbers, positive even numbers, and positive odd numbers, respectively. These variables are initially set to 0.

**Iterate Through the List:**`for num in numbers:`

- The program uses a
`for`

loop to iterate through each number in the input list.

**Categorize and Sum the Numbers:**`if num < 0: sum_negative += num elif num % 2 == 0: sum_even += num else: sum_odd += num`

- For each number in the list, it checks whether the number is:
- Negative: If yes, it adds the number to
`sum_negative`

. - Positive and even: If yes, it adds the number to
`sum_even`

. - Positive and odd: If yes, it adds the number to
`sum_odd`

.

**Return the Sums:**`return sum_negative, sum_even, sum_odd`

- The function returns the calculated sums as a tuple containing
`sum_negative`

,`sum_even`

, and`sum_odd`

.

**Input List and Calculate Sums:**`numbers = [12, -7, 5, 64, -14] sum_negative, sum_even, sum_odd = calculate_sums(numbers)`

- In the main part of the program, a list of numbers (
`numbers`

) is defined. The`calculate_sums`

function is then called with this list as input, and the results are assigned to`sum_negative`

,`sum_even`

, and`sum_odd`

.

**Print the Results:**`print("Sum of negative numbers:", sum_negative) print("Sum of positive even numbers:", sum_even) print("Sum of positive odd numbers:", sum_odd)`

- Finally, the program prints the results with clear labels, indicating the sum of negative numbers, the sum of positive even numbers, and the sum of positive odd numbers.
- By following these steps, the program processes a list of numbers and categorizes them into the specified categories, calculating and printing the sums for each category.