Operators in TypeScript Part 6

 What is operator

Operator is an object in computer programming used to evaluate an value based  on the operands defined

The operators are categorized into various groups

1 Arithmetic Operator

2 Comparison Operator

3 Bit-Wise Operator

4 Logical Operator

5 Assignment Operator

6 Special Operator

 

Arithmetic Operator

+ Addition

- Subtraction

* Multiplication

/ Division

% Modules(Reminder)

++ (Increment)

-- ( Decrement)

2  Comparison Operator

== Is Equal to   (10==20)

=== Identical Equal and of same Type  (10===20)

!= Not Equal to

!== Not Identical

> Greater than

< Less than

3 BitWise Operator

& --Bitwise And

|  Bit Wise Or

^ Bit wise XOR

<< Bit wise Left Shift

 >> Bitwise Right Shift

Logical Operator

&&--> Logical And

||--- > Logical OR

! Logical Not

Assignment Operator

= Assign

+= Add And Assign

- = Substract and Assign

*= Multiply and Assign

/ = Divide and Assign

%= Module and Assign

Special Operators in Type Script

 Ternary Operator ( ? : )

Syntax

let pin: number=4040;

console.log(pin==4040 ? "valid" : "invalid" )

Delete operator

It is used to delete a property from any specified object.

let product : any ={

Name : 'TV',

price : 333

}

delete product.price   //valid

console.log("price= " + product.price);  //undefined

Note: You cannot delete read only properties

delete Math.PI  //Invalid

In operator

It is used to verify whether the given property is available in an object .It returns true if found

Syntax

console.log("price"  in products)  //true  -- if price is found

In is used to verify the properties

OF operator

It is an special operator used to verify the values in an object. It returns boolean true if they the values are in collection.

Ex:

let cities: string[] =["Delhi" , "Hyd" ]

for( var city of cities) {

console.log(city)

}

typeof operator

It is an special operator that is used to identity and return data type of a property in an object.

Example

let product : any= {

    Id:1,

    Name: "TV",

    Isinstock : true

    }

    console.log("Id=" + typeof product.Id  + "\n"  +

     "Name=" + typeof product.Name + "\n" +

     "Isinstock=" + typeof product.Isinstock);

Output: