# Python: Find the indices of the closest pair from given a list of numbers

## Python Programming Puzzles: Exercise-66 with Solution

Write a Python program to find the indices of the closest pair from a list of numbers.

Input: [1, 7, 9, 2, 10] Output: [0, 3] Input: [1.1, 4.25, 0.79, 1.0, 4.23] Output: [4, 1] Input: [0.21, 11.3, 2.01, 8.0, 10.0, 3.0, 15.2] Output: [2, 5]

**Pictorial Presentation:**

**Sample Solution:**

**Python Code:**

```
#License: https://bit.ly/3oLErEI
def test(nums):
closest_inds = None
closest_dist = None
for ind, num in enumerate(nums):
for other_ind, num2 in enumerate(nums):
if num != num2 and ((closest_dist is None) or abs(num - num2) < closest_dist):
closest_dist = abs(num - num2)
closest_inds = [ind, other_ind]
if num <= num2:
closest_inds = [ind, other_ind]
else:
closest_inds = [other_ind, ind]
return closest_inds
nums = [1, 7, 9, 2, 10]
print("List of numbers:",nums)
print("Indices of the closest pair from the said list of numbers:")
print(test(nums))
nums = [1.1, 4.25, 0.79, 1.0, 4.23]
print("\nList of numbers:",nums)
print("Indices of the closest pair from the said list of numbers:")
print(test(nums))
nums = [0.21, 11.3, 2.01, 8.0, 10.0, 3.0, 15.2]
print("\nList of numbers:",nums)
print("Indices of the closest pair from the said list of numbers:")
print(test(nums))
```

Sample Output:

List of numbers: [1, 7, 9, 2, 10] Indices of the closest pair from the said list of numbers: [0, 3] List of numbers: [1.1, 4.25, 0.79, 1.0, 4.23] Indices of the closest pair from the said list of numbers: [4, 1] List of numbers: [0.21, 11.3, 2.01, 8.0, 10.0, 3.0, 15.2] Indices of the closest pair from the said list of numbers: [2, 5]

**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:** Circular shift number.

**Next:** Find a string which, when each character is shifted (ASCII incremented) by shift.

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

Test your Programming skills with w3resource's quiz.

## 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

**New Content published on w3resource:**- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework