Javascript functions where the variable being tested is a string

I’m working on a function that is supposed to check if a variable is equal to "this is a string" when run and logs true or false. This is what I tried:

let e = "this is string"
function stringCheck(){
  if(e = "this is a string"){
    console.log(true)
  } else{
    console.log(false)
  }
}

It didn’t work. It logs ‘true’ even when I make it so e equals something completely different. I tried switching ‘true’ and ‘false’ and that made it so it only logged as ‘false’ no matter what e equaled. I can’t figure out what’s wrong with the code.

>Solution :

You are making an assignment instead of a comparison in your function. You must use the correct operator. In this case I replaced the single = with a ===:

function stringCheck(){
  if(e === "this is a string"){
    console.log(true)
  } else{
    console.log(false)
  }
}

In JavaScript you have two different equality operators:

== compares values and makes automatic castings if necessary

2 == '2' // true. The string gets converted to number.

=== compares value AND type:

2 === '2' // false. String and number aren't equal.