3.1 Operators in JavaScript

Welcome to this introductory video for the third section of the course, dedicated to operators in JavaScript. So far you have learned how to declare variables and constants. The next step is to manipulate them to build the logic of your programs, and that's exactly what operators are for.

An operator combines variables and constants — its operands — to produce a new value, called an expression. By chaining expressions together, you can implement the algorithms and the business rules behind every real application.

The categories you will explore

• Arithmetic operators: +, -, *, /, %, **, plus increment and decrement.
• Assignment operators: = and its compound forms +=, -=, *=, /=.
• Comparison operators: >, >=, <, <=, ===, !==.
• Logical operators: &&, ||, ! for combining booleans (and, as you'll see, non-boolean values too).
• Bitwise operators: low-level operations on the bits of a number.

Each upcoming video focuses on one category with concrete examples. See you in the next lesson where we start with arithmetic operators.

Summary

This lesson introduces JavaScript operators, the fundamental tools used alongside variables and constants to build expressions. Operators enable developers to implement logic and algorithms in code. The lesson previews five operator categories—arithmetic, assignment, comparison, logical, and bitwise—setting the foundation for deeper exploration in subsequent lessons.

Key points

• Operators are essential tools that work with variables and constants to create expressions
• Five main operator types exist: arithmetic, assignment, comparison, logical, and bitwise
• Operators form the basis for implementing program logic and algorithms
• Understanding operator types is prerequisite knowledge before writing complex JavaScript logic
• Each operator category will be covered in detail in following lessons

FAQ

What role do operators play in JavaScript programming?

Operators are tools used with variables and constants to create expressions that implement the logic and algorithms your programs need to function.

How many types of operators are introduced in this lesson?

Five types: arithmetic operators, assignment operators, comparison operators, logical operators, and bitwise operators.

Will this lesson teach how to use each operator?

No—this is an introductory lesson that previews all operator types. Each type is covered in detail starting with the next lesson on arithmetic operators.