Reverse The Array

Introduction

Reversing an array is one of the basic problems in programming. It helps us understand indexing, loops, and array manipulation.

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Problem Statement

Given an array of elements, reverse the array so that the first element becomes the last and the last becomes the first.

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Approach

We can solve this problem using two-pointer technique:

1. Initialize two pointers:
   • One at the beginning (left)
   • One at the end (right)
2. Swap the elements at both positions
3. Move left pointer forward and right pointer backward
4. Repeat until left < right

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Python Code

python
def reverse_array(arr):
    left = 0
    right = len(arr) - 1

    while left < right:
        # Swap elements
        arr[left], arr[right] = arr[right], arr[left]

        left += 1
        right -= 1

    return arr

## Example: 
Input
 [1, 2, 3, 4, 5]
ouput
[5,4,3,2,1]