What are the three important manipulations done in a for loop on a loop variable

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What are the three important manipulations done in a for loop on a loop variable?



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2) What are the three important manipulations done in a for loop on a loop variable?

3) Consider the following code snippet

function tail(o)
{
for (; o.next; o = o.next) ;
return o;
}

Will the above code snippet work? If not, what will be the error?

4) Consider the following code snippet

function printArray(a)
{
var len = a.length, i = 0;
if (len == 0)
console.log("Empty Array");
else
{
do
{
console.log(a[i]);
}
while (++i < len);
}
}

What does the above code result?

5) Consider the following code snippet

function f(o)
{
if (o === undefined)
debugger;
}

What could be the task of the statement debugger?

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