while(true)

[ravian]

Hi Java Coders,

I came across the following:

Code:

while(true)
{
// code goes here
}

This while loop wont terminate. Then whats the use of it. Why Java allows such loops.

[sandeepkk2005]

Inside the loop there will be some conditions to come out of it(break
It is to execute some statements continuously unless and until some conditions reached.

[Renegade85]

Quote:

Originally Posted by ravian

Hi Java Coders,

I came across the following:

Code:

while(true)
{
// code goes here
}

This while loop wont terminate. Then whats the use of it. Why Java allows such loops.

It could test if something is true and terminate then. Simple example: It could be testing to see if i=5. Inside the loop, the i value could be changed so then it will not be true and the loop will terminate

Quote:

while(true)
{
i++;
}

[ravian]

Ok kool. So a break statement is a must if we use while(true). Otherwise it wont terminate.

[clement1]

not necessary a break statement but you need something inside the loop that alters the condition for it to exit.

e.g.
a=5;
while (a < 10)
{
System.out.println("A is " + a);
a++
}

This will print out something like:

A is 5
A is 6
A is 7
A is 8
A is 9

and then when a has reached 10, the condition is no longer true so it will break out of the loop. if you had

a=5
while(a<10)
{
System.out.println("A is " + a);
}

will be stuck in a continual loop because there is nothing inside it to alter the state of a. The program will just keep printing 'A is 5' an infinite amouint of times.

A is 5
A is 5
A is 5
A is 5
A is 5
A is 5
A is 5
A is 5
A is 5........forever.

Hope thats helped.

[ravian]

Thanks mate.
I got the point.