Least Common Multiple (LCM)?

Short answer: int LCM(int a, int b) { return a / GCD(a, b) * b; } Explanation: LCM × GCD = product of the two numbers.

Example code

int LCM(int a, int b)
{
return a / GCD(a, b) * b;
} Explanation: LCM × GCD = product of the two numbers.

Real-world example (ShopNest)

In coding rounds, state complexity aloud, write a clear ShopNest-flavored example (orders, carts), then handle edge cases (empty list, null, overflow).

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.