javascript - Understanding the while loop with value false -

im relatively new javascript , such trying understand writing.

i while loop eg:

var = 0; while (i < 10) {  console.log('i less 10');  i++; } 

but dont understand when use

while(false) { document.write('do this'); } document.write('do that'); 

the "false" value confuses me because don't understand checking against

it never run. false never true, in while(false) {...} not executed.

you not use in practice. disables block of code.

you asked "checking against." it's checking see if false evaluates true. doesn't, doesn't run in while block.