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Start your free trialIvan Marchenko
8,962 PointsSo, what's up with my code, it wont print the last line.
var qa = [
['what is 1+1', 2],
['what is 1+2', 3],
['what is 1+3', 4]
];
var correctA = 0;
var q;
var a;
function print(message) {
document.write(message);
}
for ( var i = 0; i <= qa.length; i +=1) {
q = parseInt(prompt(qa[i][0]));
a = qa[i][1];
if ( a === q ){
print('<p>Correct answer</p>');
correctA +=1;
}else {
print('wrong answer </br>');
correctA -=1;
}
}
print('<h2>Correct answers: ' + correctA + '</h2>');
2 Answers
Sean T. Unwin
28,690 PointsYou need to change your for
loop statement to run the same amount of times as qa.length
.
Currently you have i = 0
and i <= qa.length
. Since qa.length
is equal to 3, the loop is attempting to run 4 times.
Two ways to fix this (choose one method from below):
- Set
i
to 1 - Have
i < qa.length
(i.e remove the equals sign, from "<=" to be "<")
Jon Kussmann
Courses Plus Student 7,254 PointsHi,
Does it work if you move your print statement to just before your last '}'?
Ivan Marchenko
8,962 Pointsit does, but it goes inside a loop
Ivan Marchenko
8,962 PointsI tried doing it with out a function and with counsole.log, nothing works. Seams like a program just stops as soon as it finished the loop
Jon Kussmann
Courses Plus Student 7,254 PointsIt does seem odd (sorry, it's been a while since I've dealt with Javascript). Just for fun... try wrapping that last print statement in a separate for loop that only runs once.