JavaScript Operators

What is operator?

Operator is symbol which is for mathematical operation and logical manipulation.

Syntax

left-operand operator right-operand

example:
5 + 9

Arithmetic Operators

Arithmetic operators used for numeric values.

+ is used for addition.
- is used for Subtraction.
* is used for Multiplication.
/ is used for division.
% is used for Modulus (Remainder)

Program

<!DOCTYPE html>
<html>
<body>

<script>
 var a = 200;
 var b = 100;
 
 var c = a + b;
 var d = a - b;
 var e = a * b;
 var f = a / b;
 var g = a % b;
 
document.write("c = "+c);
document.write("");
document.write("d = "+d);
document.write("");
document.write("e = "+e);
document.write("");
document.write("f = "+f);
document.write("");
document.write("g = "+g);
</script>    
</body>
</html>

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+ operator in JavaScript

+ operator is used to concatenate string value in javascript.

+ operator is used to sum numbers in javascript.

Program

<!DOCTYPE html>
<html>
<body>
<script>
 var a = 200;
 var b = 100;
 
 var c = a + b;
 
 var s1 = 'sabbla';
 var s2 = '.com';
 
 var s3 = s1+s2;
 var s4 = a+s1;
 
document.write("c = "+c);
document.write("");
document.write("s3 = "+s3);
document.write("");
document.write("s4 = "+s4);
</script>    
</body>
</html>

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JavaScript Assignment Operators

= is used to assign a value into a variable.
Example var m = 100;
+= is used to add two value and assign into variable.
Example a += 100;
It means a = a + 100;

-= is used to subtract two value and assign into variable.
Example a -= 100;
It means a = a - 100;
*= is used to multiply two value and assign into variable.
Example a *= 100; It means a = a * 100;

/= is used to divide two value and assign into variable.
Example a /= 100;
It means a = a / 100;
%= is used to get remainder and assign into variable.
Example a %= 100;
It means a = a % 100;

Program

<!DOCTYPE html>
<html>
<body>

<script>
 var a = 200;
 var b = 100;
 a += b;
document.write("a = "+a);
document.write("");

 var c = 200;
 var d = 100;
c -= d;
document.write("c = "+c);
document.write("");

 var e = 200;
 var f = 100;
e *= f;
document.write("e = "+e);
document.write("");

 var g = 200;
 var h = 100;
g /= h;
document.write("g = "+g);
document.write("");

 var i = 200;
 var j = 100;
i %= j;
document.write("i = "+i);

</script>   
</body>
</html>

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