Expressions and operators

In JavaScript, an operator is a symbol used to perform operations on operands (numbers, values or variables). for example,

2+3; //5

Here + is an operator that perform addition, and 2 and 3 are operands.

JavaScript Operator Types

Here is a list of different operators you will learn in this blog.

• Assignment Operators
• Arithmetic Operators
• Comparison Operators
• Logical Operators
• Bitwise Operators
• String Operators
• Conditional (ternary) Operator
• Comma Operator
• Unary Operator
• Relational Operators

Assignment and Arithmetic Operators

let x = 5;     // Binary representation of 5 is 00000101
x <<= 2;       // Left shift x by 2 positions

console.log(x); // Output will be 20

x >>= 2;       // Left shift x by 2 positions

console.log(x); // Output will be 5

Comparison Operators

Comparison operators are used in programing to compare two values and determine the relationship between them. these operators return a Boolean value (either true or false) based on whether the comparison is true or false.

Comparison operators are used in programming to compare two values and determine the relationship between them. These operators return a Boolean value (either true or false) based on whether the comparison is true or false.

Here’s a table representation of common comparison operators, along with examples:

Logical Operators

Logical operators are used to combine and manipulate boolean values in JavaScript. They are often used in conditional statements and decision-making to control the flow of the program based on multiple conditions.

Bitwise Operators

Bitwise operators are often used for low-level manipulation of binary data, optimization, and in some specific algorithms where bit-level operations are required.

String Operators

In JavaScript, string operators are used for manipulating and combining strings. Here’s a table representation of common string operators in JavaScript, along with examples:

Conditional (ternary) Operator

The conditional operator, also known as the ternary operator, is a concise way to write conditional expressions in JavaScript. It allows you to evaluate a condition and return one of two values based on whether the condition is true or false. Here’s a table representation of the conditional operator in JavaScript, along with an example:

let age = 25;
let isAdult = (age >= 18) ? "Yes" : "No";

console.log(isAdult); // "Yes" because age is greater than or equal to 18

Comma Operator

The comma operator in JavaScript is used to evaluate multiple expressions in sequence and return the value of the last expression. It is often used in situations where multiple expressions need to be executed, but only the result of the last expression matters. The syntax is as follows:

expression1, expression2, expression3, ...;

Here’s an example of how the comma operator works:

let a = 5, b = 10, c = 15;
let result = (a++, b++, c++);
console.log(result); // 15 (the value of the last expression)
console.log(a, b, c); // 6 11 16 (all variables were incremented)

Unary Operators

Unary operators in JavaScript are operators that perform operations on a single operand. Here’s a table representation of common unary operators in JavaScript, along with examples:

Relational Operators:

Relational operators in JavaScript are used to compare two values and return a Boolean result. Here’s a table representation of common relational operators: