Reverse Array (In-Place)
Two pointers at head and tail move inward, swapping elements until they meet in middle.
Live loop — open the studio to scrub, add your own array, or race it in Battle Arena.
Asked in interviews at
Reference implementation (Python)
def reverse_array(arr):
left = 0
right = len(arr) - 1
while left < right:
arr[left], arr[right] = arr[right], arr[left]
left += 1
right -= 1
return arrEmbed this visualization
Drop a live, looping Reverse Array (In-Place) canvas into a blog post or course page.
<iframe src="/embed/reverse-array" width="100%" height="380" style="border:1px solid #e6e8ec;border-radius:14px" loading="lazy" title="3D algorithm visualization by CodeWithMunnaX"></iframe>Frequently asked
What is the time and space complexity of Reverse Array (In-Place)?
Reverse Array (In-Place) runs in O(n) time and O(1) auxiliary space.
Is the Reverse Array (In-Place) visualizer free?
The core 3D visualizer, Web Audio chimes and step intuition are free. A one-time ₹49 Pro Pass unlocks advanced algorithms, large custom arrays, Battle Arena and reel export.
Which companies ask Reverse Array (In-Place) in interviews?
Reverse Array (In-Place) shows up in interviews at Amazon, Apple.
How does the 3D visualization of Reverse Array (In-Place) work?
Each array value becomes a 3D pillar whose height maps to its value. Comparisons glow amber, swaps flash red, and settled elements lock green while a floating pointer badge tracks the active index — synchronized line-by-line with the Python code.