Reverse an Array in C | In-Place Array Reversal Using Two Pointers | C Programming
Reverse an Array in C | In-Place Array Reversal Using Two Pointers | C Programming
Reverse an Array in Place in C Programming 🔄
In this video, we learn how to reverse an array in place using the Two Pointer Technique in C.
Instead of creating an extra array, we use two pointers:
start → points to the first element
end → points to the last element
Swap both elements
Move start forward and end backward
Continue until the pointers meet
📌 Example
Original: 1 2 3 4 5
Reversed: 5 4 3 2 1
⏱️ Complexity
Time Complexity: O(n)
Space Complexity: O(1)
Technique: Two Pointers
Language: C
This is an important array and DSA interview question and is useful for students preparing for coding interviews, DSA, GATE, BARC, ISRO and other competitive exams.
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