JavaScript Operators such as Arithmetic Operators, Assignment Operators, Comparison Operators, String Operators and Logical Operators

 

JavaScript Operators:

            Javascript operators are used to perform different types of mathematical and logical computations.

Types of JavaScript Operators

There are different types of JavaScript operators:

• Arithmetic Operators
• Assignment Operators
• Comparison Operators
• String Operators
• Logical Operators
• Bitwise Operators
• Ternary Operators
• Type Operators

JavaScript Arithmetic Operators

Arithmetic Operators are used to perform arithmetic on numbers.

Eg:

let a = 3;
let x = (100 + 50) * a;

addition            +

subtraction        -

multiplication    *

Division             /

Modulus             %

Increment          ++

Decrement          --

JavaScript Assignment Operators

Assignment operators assign values to JavaScript variables.

The Addition Assignment Operator (+=) adds a value to a variable.

Eg: 

        let x = 10;

      x += 5;

JavaScript String Comparison

All the comparison operators above can also be used on strings:

Eg:

         let text1 = "A";
    let text2 = "B";
    let result = text1 < text2;

Here 'A' changed to number in  ASCII ( American Standard Code for Information Interchange).

so A is small and B is big.

JavaScript String Addition

The + can also be used to add (concatenate) strings:

Eg:

let text1 = "John";
let text2 = "Doe";
let text3 = text1 + " " + text2;

console.log(text3);

Output:

        John Doe

Adding Strings and Numbers

Adding two numbers, will return the sum, but adding a number and a string will return a string

Eg:

let x = 5 + 5;
let y = "5" + 5;
let z = "Hello" + 5;

console.log(z);

Output:

    Hello5

JavaScript Logical Operators

Logical operators are used to determine the logic between variables or values.

Given that x = 6 and y = 3, the table below explains the logical operators

Operator	Description	Example
&&	and	(x < 10 && y > 1) is true
||	or	(x == 5 || y == 5) is false
!	not	!(x == y) is true

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