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Once JavaScript encounter the string then it will take all other values as string only.

no it not a case-sensitive

current object

A prompt box allows the user to enter input by providing a text box.

It's a number in JavaScript, derived by dividing negative number by zero.

Return true if the argument is not a number.

Generation of HTML pages on-the-fly without accessing the Web server. The user can be given control over the browser like User input validation Simple computations can be performed on the client's machine The user's browser, OS, screen size, etc. can be detected Date and Time Handling.

for, while, do-while loops, but no for each.

Number, String, Boolean, Function, Object, Null, Undefined.

Inner HTML is not standard, and its a String. The DOM is not, and although inner HTML is faster and less verbose, its better to use the DOM methods like append Child(), first Child.node Value, etc to alter inner HTML content.