Explain me how plz

Question

int x=10;
int sum=0;
while(x--);
{
sum+=x--;
printf("%d",sum);

output is -1...how plz tell me

Answer 1

Notice the semicolon after the while loop. It subtracts x until -1.

Answer 2

@corejava When it reaches zero, It subtracts it by one then it stops.

Answer 3

The sum +=x--; happens outside the while loop.

As qwerty said, there is a semicolon after the while statement. The question is tricky trying to make you think the sum variable is in the while loop.

Answer 4

Nice breakdown Gordie.

Answer 5

y until -1 I couldn't get it....if while has zero only na the loop fails

Answer 6

wen it while gets 0 it will not enter the loop right
if it enters only sum will process..coz sum is with in while