Operators
Now discuss about operators in JavaScript, this is most important chapter for every programmer. So lets us take a simple expression 3+5 is equal to 8. So here 3 and 5 are called operand and "+" is called operator. Be careful this is most important line for this chapter.
JavaScript supports the following types of operators.
Lets have a look at all the operators one by one:
Arithmetic Operators:
JavaScript the following arithmetic operators :
var a =10;
var b =20;
- Assume variable A holds 10 and varaibles B holds 20, then :
 |
- Lets see the following on Code
<script>
var a= 10;
var b= 20;
resultAdd= a + b;
document.write("a + b =",resultAdd,"</br>");
resultSub= a - b;
document.write("a - b =",resultSub,"</br>");
resultMul= a * b;
document.write("a * b =",resultMul,"</br>");
resultDiv= a / b;
document.write("a / b =",resultDiv,"</br>");
resultMod= a % b;
document.write("a % b =",resultMod,"</br>");
resultIncr= a++;
document.write("a ++ =",resultIncr,"</br>");
resultDecr= b--;
document.write("b-- =",resultDecr,"</br>");
</script>
<!-- Input The Diffrent Value and Check the results -->
Comparison Operators
JavaScript also support the following comparison operators :
- Assume variable A holds 10 and varaibles B holds 20, then :
var a =10;
var b =20;
Let's see an example :
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Chapter 6 Operators</title>
</head>
<body>
<script>
document.write("Comparison Operators </br>"); // br is used for just new line
var a= 10;
var b= 20;
document.write( "a is store = 10, b is also stored 20 after that:</br> ");
document.write("(a == b) Equal To =>" ,a == b," </br>");
document.write("(a != b) Not Equal To=>" ,a != b," </br>");
document.write("(a > b) Greater than=>" ,a > b," </br>");
document.write("(a < b) Less than=>" ,a < b," </br>");
document.write("(a >= b) Greater than and Equals to=>" ,a >= b," </br>");
document.write("(a <= b) Less than and Equals to=>" ,a <= b," </br>");
</script>
<!-- Input The Diffrent Value and Check the results -->
</body>
</html>
Logical/Relational Operators:
JavaScript also provided like another language Logical Operators:
- Assume Variable a=10 and b = 20 after that,
Let's see an example:
document.write("Logical Operators </br>"); // br is used for just new line
var a= "true";
var b= "false";
document.write( "a is store = 10, b is also stored 20 after that:</br> ");
// U can just try to practical for this.
document.write("(a && b) is results==>>",a && b, "</br>");
document.write("(a != b) is results==>>",a != b,"</br>");
document.write("(a !&& b) is results==>>", (!(a && b)),"</br>");
Ans:
a is store = 10, b is also stored 20 after that:
(a && b) is results==>>false
(a != b) is results==>>true
(a !&& b) is results==>>false
(a && b) is results==>>false
(a != b) is results==>>true
(a !&& b) is results==>>false
Bitwise Opeator :
- JavaScript supports the following bitwise operators:
- Assume variable A holds 2 and varaible B holds 3 then,
- Let's see an example of all:
<script>
document.write("Bitwise Operators </br>"); // br is used for just new line
var x = 2; // bit presentation 10
var y = 3; // bit presentation 11
document.write("(x & y) =>",(x & y),"</br>");
document.write("(x | y) =>",(x | y),"</br>");
document.write("(x ^ y) =>",(x ^ y),"</br>");
document.write("(~ y) =>",(~y),"</br>");
document.write("(x << y) =>",(x << y),"</br>");
document.write("(x >> y) =>",(x >> y),"</br>");
document.write("Set the variables to different values and different operators and then try... </br>" );
</script>
- OUTPUT:
Bitwise Operators
(x & y) =>2
(x | y) =>3
(x ^ y) =>1
(~ y) =>-4
(x << y) =>16
(x >> y) =>0
Set the variables to different values and different operators and then try...
Assignment Operators
- JavaScript supports the following assignment operators:
- SameLogic appliles to bitwise operators so they will become <<=, >>=, ^= , &= , |= and ^=.
- Let's see an example :
<script>
document.write("</br> Assigment Operators");
var a=11;
var b=22;
// resultAss= (a = b);
document.write("</br> Value of a => Simple Assignment: =>>",(a = b));
document.write("</br> Value of a => Add and Assignment: =>>",(a += b));
document.write("</br> Value of a => Sub and Assignment: =>>",(a -= b));
document.write("</br> Value of a => Mul and Assignment: =>>",(a *= b));
document.write("</br> Value of a => Div and Assignment: =>>",(a /= b));
document.write("</br> Value of a => Mod and Assignment: =>>",(a %= b));
// <!-- Input The Diffrent Value and Check the results -->
</script>
OUTPUT:
document.write("</br> Assigment Operators");
var a=11;
var b=22;
// resultAss= (a = b);
document.write("</br> Value of a => Simple Assignment: =>>",(a = b));
document.write("</br> Value of a => Add and Assignment: =>>",(a += b));
document.write("</br> Value of a => Sub and Assignment: =>>",(a -= b));
document.write("</br> Value of a => Mul and Assignment: =>>",(a *= b));
document.write("</br> Value of a => Div and Assignment: =>>",(a /= b));
document.write("</br> Value of a => Mod and Assignment: =>>",(a %= b));
// <!-- Input The Diffrent Value and Check the results -->
</script>
OUTPUT:
Assigment Operators
Value of a => Simple Assignment: =>>22
Value of a => Add and Assignment: =>>44
Value of a => Sub and Assignment: =>>22
Value of a => Mul and Assignment: =>>484
Value of a => Div and Assignment: =>>22
Value of a => Mod and Assignment: =>>0
Miscellaneous Operators:
- We will discuss two operators here that quite useful in JavaScript:
- the Conditional Operator ( ?: ) and the typeof operator.
Conditional/ Ternary Operators:
- The conditional operator first evalutes an expression for a true or false value and then excutes one of the two given statements depending upon the results of the evaluation.
- ?: (Conditional) : IF condition is true? Then Value X : Otherwise value Y
<script>
document.write(" </br>Conditinal Operators </br>");
var p= 10;
var q= 20;
document.write("</br> ((a>b)? 100 : 200) => ");
resultCon = (a> b) ? 100: 200; // grater than
document.write(resultCon);
document.write(" </br> ((a>b)? 100 : 200) =>");
resultCon = (a < b) ? 100: 200; // Less than
document.write(resultCon);
</script>
TypeOf Operators:
- The typeof operator is a unary operator that is placed before its single operand , which can be of any type. Its value is a string indicating the data type of the operand.
- The typeof operator evalutes to "number", string or "boolean" if its operand is a number, string or boolean value and return true or false based on the evalution.
- Here is a list of the return values for the typeof Operator.
<script>
document.write(" </br> </br> Typeof Operator");
var t= 10;
var s="String";
resultToF = (typeof s == "string" ? " S is String" : " S is Numric");
document.write(" </br>Print Result :",resultToF);
resultToF = (typeof t == "string" ? " T is String" : " T is Numric");
document.write(" </br>Print Result :",resultToF);
</script>
Output :
((a>b)? 100 : 200) => 200
((a>b)? 100 : 200) =>100
Typeof Operator
Print Result : S is String
Print Result : T is Numric
I hope this is helpful for you, Thanks for watching.
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