How to use a while loop to divide a number continouslly?

[pikalife]

What should I write within a while loop that allows me to keep on divding a number by 2 until it meets certain conditions. for example

while(condition)
{
//what should i write here to have a double that divides by 2 until it meets the condition.
}

[plasticfood]

While(true){
   Number/2;
   If(condition)
         break;
}

[JamesCherrill]

.. or simply

double d = ....
while (condition) {
   d = d/2;
}

ps. Watch out for capitalisation. It's while, not While, and we always give variables names that begin with a lower case letter.