About static local in scopes especially in funtions and how to use them

[Butcher3Years]

Local Static Variables – The "Once Per Function" Magic 🪓

Branch: local-static
From The Cherno's C++ series — the part where he explains why static inside a function is weirdly powerful and surprisingly useful.

What is a Local Static Variable?

A variable declared inside a function with the static keyword.

void func() {
    static int counter = 0;   // ← local static
    counter++;
    std::cout << "Called " << counter << " times\n";
}



Lifetime = entire program (like global statics)
Scope = only inside the function (can't access outside)
Initialization = happens only once (first time function is called)
Stored in static storage (not stack) — survives function exits



class Singleton {
public:
    static Singleton& Get() {
        static Singleton instance;   // ← local static = thread-safe singleton
        return instance;
    }
private:
    Singleton() {}                   // private ctor
};