# Remove First & Last Problem: JavaScript

## Remove first and last letter of a given string

### The Problem

Create a JavaScript function that takes in a string & outputs a string without the first and last letter of the string removed.  

*If the given string was "reduce" the output would be "educ". If the string was "Fame" the output would be "am"*

### Things to note

In JavaScript, strings & numbers are both immutable. What's immutable mean? Once a variable has been declared as a string or number, it cannot be changed.

```
//we assign variable str to be equal to a string, "hello"
let str = "hello";
//we use the .toUpperCase() method to convert str to uppercase letters
str.toUpperCase();
//we log str to the terminal, then realize that str has NOT been changed
console.log(str);
//outputs "hello" which is the original value of str
``` 
So, how do we get around this? We need to either declare a new variable or reassign the original variable.

```
let str = "hello";

//Declare new variable
let newStr = str.toUpperCase();
console.log(newStr);
//outputs "HELLO"

//Reassign original variable
str = str.toUpperCase();
console.log(str);
//outputs "HELLO"
``` 
### Back to the problem

There are several solutions to this problem, but I will walk through my original solution.
First we want to create our function, this function will take in a string.
```
function removeFirstAndLast(str){
}
``` 
Then we want to remove the first letter and the last letter of a given string, I did this by creating a new variable and using the replace method, then I slice the last letter. We could use slice two times in a row, but we can use both to show off more methods.
```
function removeFirstLast(str) {
    let newString = str.replace(str[0], "").slice(0, -1)
    return newString
}
```
And there's my solution.