Javascript Operators : The Basics you need to know!

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While writing the javascript code , we sometimes need to perform the actions like addition and multiplication of numbers , comparing the values and making some decisions . This all can be done using small symbols called as operators.

Even though these operators looks simple (= , - , === , % ) , they are known as the building blocks of javascript program . In this blog , we’ll explore the different types of operators and learn how they help our code think, calculate, and make decisions.

1] Arithmetic: The Engine Room: Powering Your Data

These are the basics you learned in school, but with a programming twist. They take two values and spit out a new one.
The types of Artithmetic operators are : Addition , Multiplication , Division , subtraction and Modulus.

The modulus operator gives you the remainder . in above eg. you can see 3%9 = 3; means 3 is the remainder . Another example you can take is 20%2 = 0; means 0 is the remainder .
Pro Tip: Use the Modulo operator (%) to check if a number is even or odd. If num % 2 is 0, it’s even!

2] Comparison operators

Comparison operators are used to compare two values or variables.
They check whether a condition is true or false and always return a Boolean value (true or false).
The comparison operators are : greater than , lesser than , not equal to , strict equal to , loose equal to.

"The Twin Paradox: Why == and === Aren't Friends"

• The Loose Twin (==)

The Double Equals is the "chill" friend. It doesn't care about types. If you try to compare a String "5" and a Number 5, it says, "I'll just convert one of these so they match. Close enough!" This hidden conversion is called Type Coercion

console.log(5 == "5"); // true (JavaScript forces them to match)
console.log(true == 1);  // true (JavaScript treats 1 as true)

• The Strict Twin (===)

The Triple Equals is the "perfectionist" friend. It checks both the Value and the Data Type. If they aren't identical twins, it returns false. No conversions, no excuses.

console.log(5 === "5"); // false (One is a Number, one is a String)
console.log(true === 1);  // false (One is a Boolean, one is a Number)

3] Logical: The Brain Center: Building Complex Conditions

These allow your code to make decisions. Think of them as the "Logic Gates" of your application.
The logical operators are : and , not , or

AND operator:

OR operator :

NOT operator :

4] Assignment: Code Shortcuts: Levelling Up Your Efficiency

You already know =, but did you know you can do math and assign a value at the same time? well yes you can ! all thanks to assignment operators .It saves space and looks cleaner.

var points = 10;

points += 5; // treated as: points = points + 5 (Result: 15)
points -= 3; // treated as: points = points - 3 (Result: 12)

SHORT SUMMARY FOR THE TOPICS YOU READ UNTILL NOW !

Category	Operator	Name	Rule / Logic	Real-World Example
Arithmetic	+, -, *, /	Basic Math	Standard calculation.	total = price + tax
	%	Modulo	Finds the remainder.	isEven = (num % 2 === 0)
Comparison	==	Loose	Checks value only.	5 == "5" (True )
	===	Strict	Checks value + type.	5 === "5" (False )
Logical	&&	AND	All must be true.	age && hassubscription
	||	OR	At least one is true.	isWeekend || isHoliday
	!	NOT	Flips the truth.	!islocked (Unlocked)
Assignment	+=, -=	Shortcut	Math + Save result.	score += 10 (Add 10)

THANK YOU !