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

Kristine Zakaite
Kristine Zakaite
2,236 Points
Posted by Kristine Zakaite
Kristine Zakaite
2,236 Points

Why the code doesnt execute on false condition?

Hi there,

I cant fully get it, why, if while loop is set to condition false, it wouldnt execute the code block, since the condition is indeed false? How do we know that it is NOT false in this case? there is no variable above or any other info.

The code: while (false) { console.log('Hello'); } console.log('Goodbye');

Thank you.

1 Answer

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

The code while (false) is not testing anything to check the result, it has been given a literal "false" instead of a test. So that means it's never true and you can be certain that the code block will not run.

Clearly, this is only to check your understanding and is not something that would ever be done in real code.