Should one use < or <= in a for loop [closed]

Answer 1

So many answers ... but I believe I have something to add.

My preference is for the literal numbers to clearly show what values "i" will take in the loop. So in the case of iterating though a zero-based array:

for (int i = 0; i <= array.Length - 1; ++i)

And if you're just looping, not iterating through an array, counting from 1 to 7 is pretty intuitive:

for (int i = 1; i <= 7; ++i)

Readability trumps performance until you profile it, as you probably don't know what the compiler or runtime is going to do with your code until then.