Conquer the JavaScript Interview: Swap Nums [Beginner Skill Level]

Link to this Playlist:

Another related math algorithm I mentioned in video:

This is a part of my Algorithms and Data Structures playlist series. We cover a lot of common interview questions asked during whiteboards for entry level developers. Learning to master these takes time, practice, and pattern recognition. So I'll be helping you equip a toolbelt and filling it with as many tools as I can to help prepare you crush those interviews! Remember: "Luck is where practice meets opportunity."

In this video we go over how to swap variable numbers without using a third variable to hold them. This is a cool arithmetic trick that once you understand, isn't so bad. Swapping variables without creating temporary variables is a technique that can be used to save memory and improve performance, particularly in cases where the size of the variables is large or the swapping is performed frequently. On the other hand, swapping variables using arithmetic operations does not require the allocation of a temporary variable. Instead, the values of the two variables are updated using mathematical operations, which are relatively fast and efficient.

However, it is important to note that swapping variables using arithmetic operations can make the code less readable and harder to understand. Therefore, you should only use this technique if the performance benefits outweigh the cost of decreased code readability. Additionally, if the variables being swapped are of a small size or if the swapping is not performed frequently, it is generally better to use a temporary variable for clarity and maintainability.

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#algorithms #javascript #interview #interviewtips #swapnums