JavaScript QuickStart: Rules of JavaScript

JavaScript QuickStart: Rules of JavaScript

ike any other language, be it English, Japanese, Pascal, or C++, JavaScript has some basic grammar rules. Understanding these helps you “read” the script and write your own scripts. The most common scripting errors are often simple gramatical errors.

JavaScript Grammar Rules

  • Capitalization Counts
  • JavaScript is case-sensitive
  • In a JavaScript script, capitalization matters; when writing a JavaScript script, be aware of upper and lower case characters:

    DancingDog

    is not the same as

    dancingDog
    or
    Dancingdog

    Use Matching Pairs

  • Opening symbols need matching closing symbols.
  • In a JavaScript script, open and closed symbols need to work in pairs. A very common error is to omit or misplace one part of the pair.

    Sometimes you’ll use braces to set apart information. Every open brace needs a matching closing brace, like this:

    { information }

    Sometimes you’ll use a set of parenthesis characters to contain information. Every open character needs a matching closed character, like this:

    ( information )
    Sometimes you’ll use single or double quotes. Every single and double quote needs to have matching single or double ending quote marks, like this:
    ‘dogs’ or “cats”

    When you are nesting items, matching pairs become even more essential; they sort the information that belongs together, like this:

    (this information and (that and that) together)

    Use White Space As Needed

  • JavaScript ignores extras spaces.
  • Like HTML, JavaScript ignores extra white space. In a JavaScript script, you can add extra spaces or tabs to make your script text files easier to read and edit. For example, these equations will do the same thing?put a container in the variable named sendLetter. The first is just a little easier to read:

    sendLetter = visits + 3

    sendLetter=visits+3

    Use Comments
    Comment lines are places for you to make notes to yourself about what the script is doing or when the script was created and by whom. Read the comments you find in a script. They’ll help you understand what is going on. And when you write or edit a script, put in your own comments. It is a good habit, right from the beginning, to add comments.

    Double slashes mark a comment line. Anything between the double slashes (//) and the end-of-line character that is inserted when you press the hard return key is “invisible” to the script.

    This is a the way a comment looks:

    //The next line initializes a counter

    You can also create a comment block. The block starts with a /* and ends with an */, like this:

    /*
    This is a comment block. You can put many lines of text together within a block to explain what the script is doing. It is a good idea to make comments about your script so that you can later make edits or changes as necessary.
    */

    See the next section “Next Steps: Getting Your Hands Dirty.”

    devx-admin

    devx-admin

    Share the Post:
    USA Companies

    Top Software Development Companies in USA

    Navigating the tech landscape to find the right partner is crucial yet challenging. This article offers a comparative glimpse into the top software development companies

    Software Development

    Top Software Development Companies

    Looking for the best in software development? Our list of Top Software Development Companies is your gateway to finding the right tech partner. Dive in

    India Web Development

    Top Web Development Companies in India

    In the digital race, the right web development partner is your winning edge. Dive into our curated list of top web development companies in India,

    USA Web Development

    Top Web Development Companies in USA

    Looking for the best web development companies in the USA? We’ve got you covered! Check out our top 10 picks to find the right partner

    Clean Energy Adoption

    Inside Michigan’s Clean Energy Revolution

    Democratic state legislators in Michigan continue to discuss and debate clean energy legislation in the hopes of establishing a comprehensive clean energy strategy for the

    Chips Act Revolution

    European Chips Act: What is it?

    In response to the intensifying worldwide technology competition, Europe has unveiled the long-awaited European Chips Act. This daring legislative proposal aims to fortify Europe’s semiconductor

    USA Companies

    Top Software Development Companies in USA

    Navigating the tech landscape to find the right partner is crucial yet challenging. This article offers a comparative glimpse into the top software development companies in the USA. Through a

    Software Development

    Top Software Development Companies

    Looking for the best in software development? Our list of Top Software Development Companies is your gateway to finding the right tech partner. Dive in and explore the leaders in

    India Web Development

    Top Web Development Companies in India

    In the digital race, the right web development partner is your winning edge. Dive into our curated list of top web development companies in India, and kickstart your journey to

    USA Web Development

    Top Web Development Companies in USA

    Looking for the best web development companies in the USA? We’ve got you covered! Check out our top 10 picks to find the right partner for your online project. Your

    Clean Energy Adoption

    Inside Michigan’s Clean Energy Revolution

    Democratic state legislators in Michigan continue to discuss and debate clean energy legislation in the hopes of establishing a comprehensive clean energy strategy for the state. A Senate committee meeting

    Chips Act Revolution

    European Chips Act: What is it?

    In response to the intensifying worldwide technology competition, Europe has unveiled the long-awaited European Chips Act. This daring legislative proposal aims to fortify Europe’s semiconductor supply chain and enhance its

    Revolutionized Low-Code

    You Should Use Low-Code Platforms for Apps

    As the demand for rapid software development increases, low-code platforms have emerged as a popular choice among developers for their ability to build applications with minimal coding. These platforms not

    Cybersecurity Strategy

    Five Powerful Strategies to Bolster Your Cybersecurity

    In today’s increasingly digital landscape, businesses of all sizes must prioritize cyber security measures to defend against potential dangers. Cyber security professionals suggest five simple technological strategies to help companies

    Global Layoffs

    Tech Layoffs Are Getting Worse Globally

    Since the start of 2023, the global technology sector has experienced a significant rise in layoffs, with over 236,000 workers being let go by 1,019 tech firms, as per data

    Huawei Electric Dazzle

    Huawei Dazzles with Electric Vehicles and Wireless Earbuds

    During a prominent unveiling event, Huawei, the Chinese telecommunications powerhouse, kept quiet about its enigmatic new 5G phone and alleged cutting-edge chip development. Instead, Huawei astounded the audience by presenting

    Cybersecurity Banking Revolution

    Digital Banking Needs Cybersecurity

    The banking, financial, and insurance (BFSI) sectors are pioneers in digital transformation, using web applications and application programming interfaces (APIs) to provide seamless services to customers around the world. Rising

    FinTech Leadership

    Terry Clune’s Fintech Empire

    Over the past 30 years, Terry Clune has built a remarkable business empire, with CluneTech at the helm. The CEO and Founder has successfully created eight fintech firms, attracting renowned

    The Role Of AI Within A Web Design Agency?

    In the digital age, the role of Artificial Intelligence (AI) in web design is rapidly evolving, transitioning from a futuristic concept to practical tools used in design, coding, content writing

    Generative AI Revolution

    Is Generative AI the Next Internet?

    The increasing demand for Generative AI models has led to a surge in its adoption across diverse sectors, with healthcare, automotive, and financial services being among the top beneficiaries. These

    Microsoft Laptop

    The New Surface Laptop Studio 2 Is Nuts

    The Surface Laptop Studio 2 is a dynamic and robust all-in-one laptop designed for creators and professionals alike. It features a 14.4″ touchscreen and a cutting-edge design that is over

    5G Innovations

    GPU-Accelerated 5G in Japan

    NTT DOCOMO, a global telecommunications giant, is set to break new ground in the industry as it prepares to launch a GPU-accelerated 5G network in Japan. This innovative approach will

    AI Ethics

    AI Journalism: Balancing Integrity and Innovation

    An op-ed, produced using Microsoft’s Bing Chat AI software, recently appeared in the St. Louis Post-Dispatch, discussing the potential concerns surrounding the employment of artificial intelligence (AI) in journalism. These

    Savings Extravaganza

    Big Deal Days Extravaganza

    The highly awaited Big Deal Days event for October 2023 is nearly here, scheduled for the 10th and 11th. Similar to the previous year, this autumn sale has already created

    Cisco Splunk Deal

    Cisco Splunk Deal Sparks Tech Acquisition Frenzy

    Cisco’s recent massive purchase of Splunk, an AI-powered cybersecurity firm, for $28 billion signals a potential boost in tech deals after a year of subdued mergers and acquisitions in the

    Iran Drone Expansion

    Iran’s Jet-Propelled Drone Reshapes Power Balance

    Iran has recently unveiled a jet-propelled variant of its Shahed series drone, marking a significant advancement in the nation’s drone technology. The new drone is poised to reshape the regional

    Solar Geoengineering

    Did the Overshoot Commission Shoot Down Geoengineering?

    The Overshoot Commission has recently released a comprehensive report that discusses the controversial topic of Solar Geoengineering, also known as Solar Radiation Modification (SRM). The Commission’s primary objective is to

    Remote Learning

    Revolutionizing Remote Learning for Success

    School districts are preparing to reveal a substantial technological upgrade designed to significantly improve remote learning experiences for both educators and students amid the ongoing pandemic. This major investment, which

    Revolutionary SABERS Transforming

    SABERS Batteries Transforming Industries

    Scientists John Connell and Yi Lin from NASA’s Solid-state Architecture Batteries for Enhanced Rechargeability and Safety (SABERS) project are working on experimental solid-state battery packs that could dramatically change the

    Build a Website

    How Much Does It Cost to Build a Website?

    Are you wondering how much it costs to build a website? The approximated cost is based on several factors, including which add-ons and platforms you choose. For example, a self-hosted