Usage of boolean variable without comparison in while loop-CodePudding

boolean flag=true;
while(flag)
{
   //code(flag=false;)
}

In the above code ,inside the while loop condition simply flag is given. How does the while condition satisfy here?

CodePudding user response：

A conditional expression needs to be a boolean. This could include using a constant (true), equality (==), inequality (!=, >, <), or method call (.equals()).

You already have a boolean variable, and this is a constant (not in the term that its value/reference cannot change), and therefore a valid conditional expression.

The while loop will run as long as the expression evaluates to true.

CodePudding user response：

Below is the syntax of the while loop. It has a condition and a body. It repeats as long as the condition is true. The body of the loop performs the work and update the condition if it needs to terminate the loop.

while(<condition>){
  <body>
}

Here's an example:

Repeat until i reaches the value 10.

boolean reachTen = false;
int i=0;
while(! reachTen ){
  System.out.println(i  );
  if (i == 10) reachTen = true;        
}

I often do not use a fag. Instead, I use break to terminate the loop.

int i = 0;
while(true){
  System.out.println(i  );
  if (i == 10) break;
}