> For the complete documentation index, see [llms.txt](https://eleven-fifty-academy.gitbook.io/javascript-100-prework-gitbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://eleven-fifty-academy.gitbook.io/javascript-100-prework-gitbook/javascript-library/0-prework/4-js-basics/strings.md).

# strings

In this module we'll discuss strings.

## Description

Strings are used in every application that you'll ever use, usernames, passwords, lists of products, and anything else that will have a plain English value(other languages too). Strings are a group of characters "strung" (concatenated/added) together. Strings must go in quotes.

## File Location

You should be located in the following file:

```
   javascript-library
        └── 0-PreWork
            └── 1-HTML-Basics
            └── 2-CSS-Basics
            └── 3-JavaScript-Basics
                03-strings.js       <---- this file in this module.
```

## String Examples

Let's print a few strings to the console:

```javascript
console.log("I was born in Indianapolis.");
console.log("I've lived in three states.");
console.log("I like Indiana the best.");
console.log("My bank account had two million bucks in it. It's gone now.");
```

## Variables

Just like integers, we need the var keyword(or const or let) to hold the value in a container. Here are a few examples:

```javascript
var tweet = "Lebron is king! Westbrook for president!";
var facebookPost = "Just thought I'd share this goofy video of my dog eating our couch.";
var username = 'jamespauloconnor';
```

## Numbers in a String

You can use numbers in a string, but you won't be able to do math operations. Numbers in quotes are treated as text.

```javascript
var password = "123456789HELLO";
var birthDay = "August 11";
```

## Concatenation

Concatenating happens when we add 2 strings together.

```javascript
var birthCity = "Indianapolis ";
var birthState = "Indiana";

console.log(birthCity + ", " + birthState);
```

## Challenge

QUICK CHALLENGE: See if you can print your own birth city and birth state to the console. What would you have to do?

## Strings and Numbers

We can mix strings and integers together.

```javascript
var ageInAugust = 40; 
var highSchool = "Bill Murray High School";
var graduatedHighSchool = 1994;

console.log(highSchool + commaWithSpace + graduatedHighSchool);
console.log("My age in August:", ageInAugust);
```

## Another Challenge:

Write a string that has two variables. Output I graduated from Bill Murray High School in 1994.

```javascript
var gradYear = 1994;
var highSchool = "Bill Murray High School";

console.log("I graduated from " + highSchool + " in " + gradYear + ".");
```

## String Methods

String Methods allow us to introduce functions w/o having to worry about writing them. In JS, Strings, Numbers, and Booleans (not yet covered) have some built in properties and methods that are available through using the `.` operator.

We'll talk more about this in the future, but here are a few items to get you familiar with the syntax:

```javascript
//length - returns the length of a string (including spaces)
console.log(highSchool.length); 

//lower or upper case
console.log(highSchool.toUpperCase()); //BILL MURRAY HIGH SCHOOL
console.log(highSchool.toLowerCase()); //bill murray high school

console.log(highSchool.split(" ")); //splits the string into an array on each space['Bill', 'Murray', 'High', 'School' ]
console.log(highSchool.slice(10)); // cuts off everything before the nth index
```


---

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