JavaScript Tutorial #3: Operators and Expressions
Welcome back to the Spider Cyber Team JavaScript series. Now that you know how to store data in variables, it's time to learn how to manipulate that data using Operators.
1. Arithmetic Operators
These are used to perform standard mathematical calculations:
- + (Addition): Adds numbers or joins strings.
- - (Subtraction): Subtracts numbers.
- * (Multiplication): Multiplies numbers.
- / (Division): Divides numbers.
- % (Modulus): Returns the division remainder.
- ** (Exponentiation): Raises to a power (ES6).
let x = 10;
let y = 3;
console.log(x + y); // 13
console.log(x % y); // 1 (Remainder of 10/3)
console.log(x ** 2); // 100 (10 squared)
2. Assignment Operators
Used to assign values to variables. The most common is =, but there are shortcuts:
x += 5(Same as x = x + 5)x -= 2(Same as x = x - 2)
3. Comparison Operators
Essential for logic, these return a Boolean (true or false):
- == : Equal to (checks value).
- === : Strict equal (checks value AND type).
- != : Not equal.
- > / < : Greater than / Less than.
let a = 5;
let b = "5";
console.log(a == b); // true (values are same)
console.log(a === b); // false (different types: number vs string)
4. Logical Operators
Used to combine multiple conditions:
- && (AND): True if both are true.
- || (OR): True if at least one is true.
- ! (NOT): Reverses the result.
Conclusion
Operators allow your code to "think" and calculate. In the next lesson, we will use these operators with If-Else Statements to control the flow of our programs!
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Keywords: JavaScript Operators, Arithmetic vs Logical operators, JS assignment operators, JavaScript Tutorial for beginners, Spider Cyber Team coding, learn JavaScript 2026, JS comparison operators.
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