Consider the following code snippet :

var tensquared = (function(x)
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Consider the following code snippet :

var tensquared = (function(x)
 {
return x*x;
}
(10));

2) Do functions in JavaScript necessarily return a value ?

3) When does the function name become optional in JavaScript?

4) Consider the following code snippet :

function constfuncs()
  {
     var funcs = [];
     for(var i = 0; i < 10; i++)
         funcs[i] = function()
 {
 return i;
 };
     return funcs; }
 var funcs = constfuncs();
 funcs[5]()

5) What is the purpose of a return statement in a function?