# Python: Reorder numbers in increasing/decreasing order based on whether the first plus last element is even/odd

## Python Programming Puzzles: Exercise-75 with Solution

Write a Python program to reorder numbers from a given array in increasing/decreasing order based on whether the first plus last element is odd/even.

Input: [3, 7, 4] Output: [3, 4, 7] Input: [2, 7, 4] Output: [7, 4, 2] Input: [1, 5, 6, 7, 4, 2, 8] Output: [1, 2, 4, 5, 6, 7, 8] Input: [1, 5, 6, 7, 4, 2, 9] Output: [9, 7, 6, 5, 4, 2, 1]

**Pictorial Presentation:**

**Sample Solution:**

**Python Code:**

```
#License: https://bit.ly/3oLErEI
def test(nums):
return sorted(nums, reverse=(False if (nums[0] + nums[-1]) % 2 else True))
print("Reorder numbers of a give array in increasing/decreasing order based on whether the first plus last element is odd/even.:")
nums = [3, 7, 4]
print("\nList of numbers:",nums)
print("Result:")
print(test(nums))
nums = [2, 7, 4]
print("\nList of numbers:",nums)
print("Result:")
print(test(nums))
nums = [1, 5, 6, 7, 4, 2, 8]
print("\nList of numbers:",nums)
print("Result:")
print(test(nums))
nums = [1, 5, 6, 7, 4, 2, 9]
print("\nList of numbers:",nums)
print("Result:")
print(test(nums))
```

Sample Output:

Reorder numbers of a give array in increasing/decreasing order based on whether the first plus last element is odd/even.: List of numbers: [3, 7, 4] Result: [3, 4, 7] List of numbers: [2, 7, 4] Result: [7, 4, 2] List of numbers: [1, 5, 6, 7, 4, 2, 8] Result: [1, 2, 4, 5, 6, 7, 8] List of numbers: [1, 5, 6, 7, 4, 2, 9] Result: [9, 7, 6, 5, 4, 2, 1]

**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 :**

**Have another way to solve this solution? Contribute your code (and comments) through Disqus.**

**Previous:** Find a string consisting of space-separated characters with given counts.

**Next:** Find the index of the largest prime in the list and the sum of its digits.

**What is the difficulty level of this exercise?**

Test your Programming skills with w3resource's quiz.

## Python: Tips of the Day

**Decapitalizes the first letter of a string:**

Example:

def tips_decapitalize(s, upper_rest=False): return s[:1].lower() + (s[1:].upper() if upper_rest else s[1:]) print(tips_decapitalize('PythonTips')) print(tips_decapitalize('PythonTips', True))

Output:

pythonTips pYTHONTIPS

**Weekly Trends**- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join
- JavaScript functions Exercises
- Python Tutorial
- Python Array Exercises
- SQL Cross Join
- C# Sharp Array Exercises

We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook