Javascript array question

[Matt512]

1st question.

<script language="JavaScript">
var a = [1,2,3,4,5,6,7,8,9,10];
var display = whatisthis(a, a.length);
document.writeln("<h1>Output:" + display + "</h1>");
function whatisthis(b, chkdis) {
if (chkdis == 1)
return b[0];
else
return b[chkdis - 1] + whatisthis(b, chkdis - 1);
}
</script>

2nd question.
What is the value of the variables b and d after the following
JavaScript code is executed?

<script type="text/javascript">
var a = 5, b = 2, c = 2, d = 1;
var fruit = new Array();
fruit[0] = "pear";
fruit[1] = "apple";
fruit[2] = "guava";
fruit[3] = "orange";
fruit[4] = "grape";
fruit[5] = "avocado";
fruit[6] = "cherry";
if( b <= c ){
d = a – b * c;
b = fruit[d];
} else {
d = a;
b = fruit[c];
}
alert( "b now contains: " + b + " and d contains: " + d);
</script>

Can anyone explain to me what are the answers of those two questions and how you came to it?

[Ingolme]

This looks copied and pasted from some kind of homework question. Can you tell me how far you've gotten on your own and which line of code you don't understand?

 

The language attribute on the script tag is deprecated and shouldn't be used.

[justsomeguy]

You only gave 1 question, your first "question" is just a block of code. Your second piece of code will print the answer if you execute it.

[Ingolme]

I believe the first question is to figure out what the function does, that's why the function is named "whatisthis".

 

The function in the first question will probably not work as the creator intended due to the ambiguity of the + operator.