Questions -= 1 doesn't work

Question

Hello,

When writing

questions = questions - 1;

my javascript code execute well.

But when writing

questions -= 1;

i have an error.

Bellow is my full code :

var questions = 3;
var questionsLeft = ' [' + questions + ' questions left]';
var adjective = prompt('Please type an adjective' + questionsLeft);

var questions = questions - 1;
var questionsLeft = ' [' + questions + ' questions left]';
var verb = prompt('Please type a verb' + questionsLeft);

var questions -=1;
var questionsLeft = ' [' + questions + ' questions left]';
var noun = prompt('Please type a noun' + questionsLeft);


alert('All done. Ready for the message?');
var sentence = "<h2>There once was a " + adjective;
sentence += ' programmer who wanted to use JavaScript to ' + verb;
sentence += ' the ' + noun + '.</h2>';
document.write(sentence);

What's the problem here ? I really don't understand.

Answer 1 · 2020-02-16T17:57:10Z

February 16, 2020 5:57pm

You should only declare a variable once, all other references should not have "var" in front of them:

var questions = 3;          // "var" is correct the first time
// ...
questions = questions - 1;  // but after that, don't use "var" again
// ...
questions -= 1;             // same here

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theo vg

theo vg

Questions -= 1 doesn't work

1 Answer

Steven Parker

Steven Parker