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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops Review while loops, do...while loops, and Loop Conditions

Posted by Gena Israel
Gena Israel
2,047 Points

why does this also print goodbye, i thought that a while loop will not run if while is false

do { console.log('Hello'); } while (false) console.log('Goodbye');

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

A while loop will indeed not run if the condition is false. But what you have posted is not a while loop. It is a do/while loop with a console.log statement below it.

The while keyword that follows the do keyword is a part of the do/while loop, and simply specifies whether the do/while loop will run more than once. Since it is false in this instance "Hello" is only printed once, if it were set to true instead then "Hello" would have been printed out indefinitely.