• Log In
  • Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Digital Systems

Department of Management Information Systems, Temple University

Digital Systems

MIS 2101.730 ■ Spring 2023 ■ Steven E. Sclarow, AIA
  • Home
  • About
    • Course Materials
    • Course Requirements
    • Email Policy
    • Grading
    • Gradebook
    • Instructor
    • Temple and COVID-19
    • Zoom Requirements
    • Zoom Links
  • Canvas Content
  • Coding Files
  • Helpdesk
  • Zoom Links
  • Video Vault
  • Diamond Peer Corner
  • Posts
    • 1a Questions
    • 1b Questions
    • 2a Questions
    • 2b Questions
    • 3a Questions
    • 3b Questions
    • 4a Questions
    • 4b Questions
    • 5a Questions
    • 5b Questions
    • 6a Questions
    • 6b Questions
    • 7a Questions

Variables in Javascript

Molly Lawrence - February 27, 2023 Leave a Comment

In Javascript, a variable is a name of a location that holds data. You use the word let keyword to declare the name you are giving your variable. For example, you would write something like “let MyBook =”. You are now giving your variable a name, the name being MyBook. Now you have to initialize your variable to a value. A value in Javascript is created by assigning it a name. All pieces of data provided in Javascript are considered to be values. Values can be numbers, functions, and, text. Values need to be easily identified and reusable. You can initialize your variable by giving it a value. For example, you would write let MyBook = “I Love Reading”. Now the variable has been given a value. When you run this code, “I Love Reading” is the output. When naming a variable, there are some rules. The variable name must start with either a letter, underscore, or the $ symbol, but they can never start with a number. Once the first character is placed you can incorporate any character you want to finish the name. No spaces are allowed in the name but you are allowed to include anywhere from one to one million characters if you want the name. 

There are arithmetic operators in Javascript. These operators allow for certain mathematic actions to be taken when used in the code. Some of the common ones we use are:

addition +

subtraction – 

multiplication *

division /

modulus %

When using these arithmetic operators, we have to remember that Javascript uses the PEMDAS rules, which state which part of the equation is to be calculated first. For example in the equation (9*3)+1, the parenthesis would have to be calculated before the 1 is added. 

Reader Interactions

Leave a Reply Cancel reply

You must be logged in to post a comment.

Primary Sidebar

ANNOUNCEMENTS & POSTS

What is HTML and how it is used in our everyday lives! Part 2

The coding language that adds design elements to a web page is Cascading … [More...] about What is HTML and how it is used in our everyday lives! Part 2

What is HTML and how it is used in our everyday lives! Part 1

The coding language that adds structure to a web page is HTML (Hypertext … [More...] about What is HTML and how it is used in our everyday lives! Part 1

What are Loops?

Why do we use loops? Loops are used in programming to execute a set of … [More...] about What are Loops?

Importance of IF/ELSE Statements!

Why do we use if/else statements? We use if/else statements in programming … [More...] about Importance of IF/ELSE Statements!

The Functioning of JavaScript

A function in JavaScript is a block of code designed to perform a specific … [More...] about The Functioning of JavaScript

What does JavaScript mean to you? Read more to find out what it means to Shivam Joshi!

A variable in JavaScript is a container that holds a value, which can be a … [More...] about What does JavaScript mean to you? Read more to find out what it means to Shivam Joshi!

ITA CONTACT INFO

Tarisha Sarker - Diamond Peer

Email: tarisha.sarker@temple.edu
Office Hours: Monday, 3-5 PM
Zoom Link: https://temple.zoom.us/j/91454347337

Instructor

Steven E. Sclarow, AIA

Email: sclarow@temple.edu
Office Hours Availability: M | W, 9:30 - 10:30 AM, or by appointment. Please email me if you need to schedule an appointment outside of my normal office hours.
Zoom Link: https://temple.zoom.us/j/96464375557

Helpful Links

FOX Laptop Policy

Gradebook

Installing-VS-Code-Windows
Installing-VS-Code-Mac-OS

Copyright © 2025 · Department of Management Information Systems · Fox School of Business · Temple University