clever.md

Remember

This is ok:

for(int i = 1; i <= floor(sqrt(n)); i++) {
    //code
}

This is good:

for(int i = 1; i * i <= n; i++) {
    //code
}

This is better:

int limit = floor(sqrt(n));
for(int i = 1; i <= limit; i++) {
    //code
}

This is a little better

const int limit = floor(sqrt(n));
for(int i = 1; i <= limit; i++) {
    //code
}

@pbalduino Not sure if I agree. I mean, it's rather easy for the compiler to figure out which local variables change and which don't. I think const should only be used to ensure const-correctness in interactions. For local variables, the only interaction I see is passing it by reference to another method.