Lambda Square Operation

Question

Problem: Lambda Square Operation. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 
using namespace std;

int main() {
    int n;
    cin >> n;

    auto square = [](int x) { return x * x; };

    cout << "Square=" << square(n);
    return 0;
}

Explanation & Logic Summary:

The lambda expression [](int x) { return x * x; } is assigned to the variable square
It behaves like an inline function that:
- Accepts one integer
- Returns the square of that integer
The lambda is defined inside main(), keeping the logic local and concise
The input range ensures that x * x remains within the valid bounds of a 32-bit int

👉 In simple words:
This is a small, inline function created exactly where it is needed, avoiding unnecessary global functions.

Firmware Relevance & Real-World Context:

In firmware and embedded C++:

Lambdas are useful for small, localized logic
Common use cases include:
- Scaling sensor or ADC values
- Lightweight callbacks
- Short event-handling logic
Keeping such logic inline improves:
- Readability
- Maintainability
- Scope safety in constrained systems

This problem reinforces safe arithmetic, modern C++ usage, and embedded-friendly coding practices.

197. Lambda Square Operation