Exercises

  1. What is the result of executing each of these lines in the console? Why?
            > var a; typeof a; 
            > var s = '1s'; s++; 
            > !!"false"; 
            > !!undefined; 
            > typeof -Infinity; 
            > 10 % "0"; 
            > undefined == null; 
            > false === ""; 
            > typeof "2E+2"; 
            > a = 3e+3; a++; 
    
  2. What is the value of v after the following?
            > var v = v || 10; 
    

    Experiment by first setting v to 100, 0, or null.

  3. Write a small program that prints out the multiplication table. Hint: use a loop nested inside another loop.
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