What does it mean to put somthing inside {}

Question

for example

int x = 10;

while(x > 0){System.out.println("hello");--x;}

**output hello x10,**

why wouldent it do the same thing if i just

int x 10;

while(x > 0)

System.out.println(x);--x;

**output time limit exceeded**

ain't they both doing the same thing?

Answer 1

You are only allowed 1 statement after a while, for loop or if without the use of brackets. Any more than 1 and the brackets are required to run the next statement(s) inside the while loop. This is why you get the infinite loop in your example. System.out.println(x);--x; <-- 2 statements
You could, however accomplish it by doing:

while(x > 0)
System.out.println(x--);

Answer 2

thank you