JavaScript Arithmetic Operators:

Operator	Description	Example
+	Addition	10+5=15
–	Subtraction	10-5=5
*	Multiplication	10*5=50
/	Division	10/5=2
%	Moduls	10%3 = 1
++	Incerement	var billo = 10; billo++ now billo =11
—	Decrement	var billo = 10; billo– now billo =9

Example1: var b = 20+5;

document.write(b);

output=25

Example2: var b = 20;

var g = b+5+10+80+42+1080

document.write(g);

Note: You can get the result of a string expression using the eval() function, which takes a string expression argument like eval (“50+92*9”) and get output. if the argument will be empty, the output will be undefined.

Operator	Description	Example	Result
Var++	Post Incrment	var b=0,g=10; var b= g++	b=10 and g=11
++Var	Pre Increment	var b=0,g=10; var b= ++g	b=11 and g=11
Var–	Post Decrement	var b=0,g=10; var b= g–	b=10 and g=9
–Var	Pre Decrement	var b=0,g=10; var b= –g	b=9 and g=9

JavaScript Assignment Operators:

Operator	Example	is equivalent to
=	b=g	b=g
+=	b+=g	b=b+g
-=	b-=g	b=b-g
*=	b*=g	b=b*g
/=	b/=g	b=b/g
%=	b%=g	b=b%g

Note: We can use multiple Assignment Operators in one line example: b-=g+=11

JavaScript Comparison Operators:

Var num= 10;

Console.log(num==8);

output: False

Operator	Description	Example	Result
==	equal to	5==10	False
===	identical equal to	5===10	False
!=	not equal to	5!=10	True
!==	not identical	10!==10	False
<	less than	10<5	false
<=	less than equal to	10<=5	false
>	greater than	10>5	True
>=	greater than equal to	10>=5	True

JavaScript Logical Operators:

Logical operations, also known as Boolean operators, AND, OR, NOT

Example: Var age=55;

Var isAdult = (age<18)? “Too young”:”Old enough”;

document.write(isAdult);

output: Old enough

JavaScript String Operators:

Var St1 = “I’m Learner”;

Var St1 = “JavaScript with Boomitechie”;

Var St3 = “My Billo”;

document.write(My St1+My St2+My St3);

Note: Numbers in quotes are treated as Strings: For example: “200” is not a number 200 is a String

JavaScript Conditionals and Loops:

if Condition:

if(Condition){

—————

Statements —————

}

Note: Statement will only be executed if the specified condition is true

Var myNum1 = 8;

Var myNum2 = 11;

if(myNum1<myNum2){

alert(“Boomitechie is good website to learn JavaScript”);

}

Else Condition:

We can use the else condition to specify a block of code that will execute if the condition is false

Example: if(Expression){

————–

}

else {

—————

}

if and else statements working together

Var Num1 = 8;

Var Num1 = 11;

if(Num1>Num2){

alert(“this is 1st condition”);

} else{

alert(“this is 2nd condition”);

}

Note: we can go this way also [with the help of operators b>g? alert (b) : alert (g) ]

amit verma

Website | + posts

Technical content writer with data scientist, artificial intelligence, programming language, database. He has a bachelor’s degree in IT and a certificate in digital marketing, Digital transformation web development android app development He has written for website like Boomi techie, tech mantra, information hub, Tech all