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Pros of defining a function to be constexpr
What are the pros for defining a function to be constexpr. For example the gcd function
ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
can be written using constexpr
constexpr ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; }
Is there any improvement in time it takes to run or execute the program or any other benefits?
