Q: Explain the difference between escape() and unescape() functions?

Answer:

The escape() function allows for converting a string into a coded form in JavaScript. It is used for securely transferring information from one system to another over some network. For instance, consider the following code snippet:

    
        This%20string%20is%20encoded%21
                        

The output of the aforementioned code snipped will be something like this:

    
        This%3F%20string%20is%20encoded%21
    

The unescape() function does the exact opposite of the escape() function i.e. it decodes a coded string into the original string. Therefore, the following code snippet:

    
        This? string is encoded!
    

Will yield the following output:

    
        This string is encoded!