C program question:

If i have a program that asks the user for a positive integer an i save that in the variable n. And then i have a while statement like so :
while (n) {
invert (P)
n = n & n-1
}

what is that while loop saying? Is it saying "while true"? isn't it always true?

Question

C program question:

If i have a program that asks the user for a positive integer an i save that in the variable n. And then i have a while statement like so :
while (n) {
invert (P)
n = n & n-1
}

what is that while loop saying? Is it saying "while true"? isn't it always true?

e.mccormick · Answer

n = n & n-1 $\leftarrow$ if there is ever a time that either of those could be 0, then the and will return false.