Help in code

help
,
1 
auto f=[&](int u){
        for (int i=2;i<=u;++i){
            if (u%i==0) return i;
        }
    };

What is this doing?

2

It’s a lambda function. It’s a little bit like a normal function, but it can steal variables from it’s surroundings. The function returns the smallest factor of u.

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3

So, is this like declaration? f=[&] ( )

4

https://en.cppreference.com/w/cpp/language/lambda
You can read about it here. It’s called a capture, not a steal. My bad.

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