What int does in for loop? It declares a variable or other thing ?(sorry for my bad english)

Question

for (int x = 1; x < 10; x++) {
// some code
}

Answer 1

Here int x=1 declares variable x and initializes it with value which is 1.
And not only in for loop but anywhere else also, in your code whenever you write int/char/float/double or any other datatype and then some variable name, then you are declaring a variable.