These are related to JavaScript functions:

Discuss possible ways to write a function isInteger(x) that determines if x is an integer.

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Write a sum function which will work properly when invoked using either syntax below.

console.log(sum(2,3)); // Outputs 5

console.log(sum(2)(3)); // Outputs 5

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What will the following code output to the console:

console.log((function f(n){return ((n > 1) ? n * f(n-1) : n)})(10));

Explain your answer.

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Consider the code snippet below. What will the console output be and why?

(function(x) {

return (function(y) {

console.log(x);

})(2)

})(1);