Lowercase Javascript

Michael Zippo 04.11.2021

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The JavaScript toLowerCase () method returns a string without uppercase letters. Likewise, the toUpperCase () method returns a string without lowercase characters. They both accept a chain and return that chain in another case.

When working with a string in JavaScript, you may come across a situation where you want to change the case of the string. For example, if you create a registration form that collects a user’s email address , you can the email address to appear in all lowercase letters.

This is where JavaScript toUpperCase functions come in . () and toLowerCase (). These functions allow you to convert a string to upper and lower case, respectively.

In this tutorial, we’ll explore how to use the toUpperCase () and toLowerCase () string methods in JavaScript. We’ll also look at an example of each of these methods in a real program.

After reading this article you will be an expert in using these string methods! Let’s get started.

JavaScript strings and case

Strings are a type of data, in Java, used to store text. Strings can include letters, symbols, numbers, and spaces. The data type string is important because it allows developers to communicate text- based data through a computer program.

In JavaScript, strings can be declared using single quotes ("" ), double quotes ("" ), or double quotes inverse (’’ ). . Single and double quotes can be used interchangeably, although you should keep the use of both in a consistent program

Here is an example of a string in JavaScript:

Strings do a sensitive distinction analysis >. This means that when comparing the strings, the Searching strings , or otherwise manipulating strings, where each individual character will have an impact on how you work with the string. For example, if you compare two strings in different cases, the strings will not be considered equal by JavaScript

toUpperCase () and toLowerCase () are useful as they allow you to convert a string in particular case. This means that you can make equal comparisons and easily manipulate the contents of a string by converting the string to a specific case.

JavaScript toUpperCase

toUpperCase () convert string to uppercase. toUpperCase () does not change the value of a string, but returns an uppercase copy of the string.

Here is the syntax toUpperCase ():

toUpperCase () takes no arguments and returns a copy of the string by chance. Let’s take an example to illustrate how it works.

Let’s say you have a restaurant and want to write a program that helps the booking check clerk if someone is on the VIP list. We have a list of VIPs stored in all caps.

Esther McKay has just arrived and our assistant wants to check if she is on the VIP list. The following program would allow our wizard to do this:

When we run our code, the following response is returned:

Let pause our code. On the first line we declare a list called vips which stores all the VIP names. Next, we declare a variable called client which stores the name of our client. In this case, client is assigned the value Esther McKay.

Next, we create an if statement that checks if the value of customer is in the vips list. To do this we use toUpperCase () to retrieve our client’s name in uppercase, we use the INCLUDES () to check if vips includes client name

In this case , ESTHER MCKAY is in our VIP list, our program prints the message Esther McKay is in the VIP list. at the console. If the name was not in the VIP list, the message Esther McKay is not in the VIP list. would have been returned.

JavaScript toLowerCase

JavaScript method toLowerCase () converts a string to lowercase letters. Just like the toUpperCase (), toLowerCase () does not modify the original string . Instead of this, it returns a copy of the string where the letters are converted to lowercase

The syntax toLowerCase () :.

toLowerCase () method ions exactly similar to toUpperCase (), but instead of converting a string to uppercase it converts the string to lowercase.

Let ’s take an example to illustrate this method in action. Suppose you create a login form for a website and store all email addresses in lowercase. So, before registering a user’s email address , you need to convert it to lowercase.

This is common practice because when a user logs in, you’ll want to look at the email address they entered into your database. If a user first sent an email address with sensitive character case, it may affect the ability to find that email in the database

You can convert the email address that ’a user sent in lowercase using this code:.

Our code returns: " emily .saunders @ gmail.com ‚". As you can see, the email address has been converted to lowercase

Conclusion

In this guide, we have discussed how to use toUpperCase () and toLowerCase () to convert an all to uppercase and lowercase string, respectively. We have also shown an example of each of these methods in the

Now you’re ready to start use toUpperCase () and toLowerCase () to convert cases to JavaScript strings like an expert.

We hope this article has helped you to resolve the problem. Apart from Lowercase Javascript, check other code Python module-related topics.