[sankalpk]

I did the same thing with my sister(who doesn't know any code) and the same issues came up with her as well. This is definitely a design issue. How to make the UI better?

In the initial stages of learning of learning a concept, have a dialogue appear for each error saying something like:

When you're coding in the real world no one is going to tell you this, but we've got your back! You forgot the quotes around your name. This problem occurs because some programming languages are case-sensitive, meaning that you have to type it in exactly the way Javascript wants you to. We'll give you a heads up about using quotes 4 more times and after that you're on your own.

To fix this error type in: "Janet".length instead of Janet.length

[jnbiche]

Just in case any non-programmers are reading this, the quotes around a string (like your name in the Codecademy example in question), have nothing to do with case, or being case-sensitive. Programming languages have basic building blocks called primitive data types, and for many programming languages, strings represent one type of those building blocks. Traditionally, strings are indicated by putting double- or single-quotes around the letters of the strings, but they just as easily could be indicated by two parentheses, or dollar signs. It's a convention for denoting a string, no more, just like quotes in English and certain other natural languages represent certain features of the language, often direct speech.

[adeelk]

Ahem, “case-sensitive”?