Do boolean statements get executed or just evaluated?

Question

Sorry if the title is not very clear. Thing is; suppose I have a while loop that reads a string from a file and stores it into an array with fscanf. Clearly, I need this loop to be executed until fscanf returns EOF. The thing is, if my code says something like
while (fscanf(file, "%s", array) != EOF)
will the statement be actually executed? That is, will fscanf read the file and copy a string into the array, or will it just verify if it returns EOF and proceed to execute the branch within {}?
Thanks in advance

Answer 1

First it will read the string into array, then fscanf returns the number of items or variables filled or read..