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  1. Consider the following code snippet

    function f(o) 
    {
         if (o === undefined) debugger;
    }
    What could be the task of the statement debugger?
    2. A.
    It does nothing but a simple breakpoint
    B.
    It debugs the error in that statement and restarts the statement's execution
    C.
    It is used as a keyword that debugs the entire program at once
    D.
    All of the mentioned

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    Answer : Option A

    Explanation :

    The debugger statement normally does nothing. If, however, a debugger program is available and is running, then an implementation may (but is not required to) perform some kind of debugging action. In practice, this statement acts like a breakpoint: execution of JavaScript code stops and you can use the debugger to print variable's values.

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