Here's some code that might help, assuming that you are using JavaScript.
e = "Hello"
if(e === "Hello"){
alert(":D")
}else{
console.log("Um.")
}
I think that the answer is curly brackets.
You have to draw the extra lines out
Txt
Note, only Windows really cares about the file extension. OSX's Finder will use it if Finder can't find a creator in the file metadata to select an app when double clicking on it. Linux and Unix don't care.