Permutation of Array in Java | nPr & nPn | Easy Backtracking Method
Автор: TERMINAL CODERS
Загружено: 2026-01-14
Просмотров: 3
In this video, we explain how to generate all permutations of an array in Java using an efficient backtracking and swap-based approach.
This video covers:
✔ Permutation logic in Java
✔ Difference between nPn and nPk
✔ How to print permutations without extra space
✔ Step-by-step recursion and backtracking explanation
✔ Generic permutation function using Java Generics
Example explained:
5P3 = 60 permutations
5P5 = 120 permutations
This permutation logic is commonly asked in:
• Java interviews
• Data Structures & Algorithms (DSA)
• Competitive programming
• Coding tests (FAANG, product-based companies)
Source code included and explained clearly.
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#java #permutation #backtracking #recursion #dsa #codinginterview #javaprogramming
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