Introduction

Operators are the backbone of any programming language, enabling developers to perform various computations and logical operations. In JavaScript, operators are categorized into several types, each serving a unique purpose. This blog post delves into the most essential operators: Arithmetic Operators, Comparison Operators, Logical Operators, Assignment Operators, the Ternary Operator, and Spread and Rest Operators.

Arithmetic Operators

Arithmetic operators are used to perform mathematical calculations. JavaScript provides a comprehensive set of arithmetic operators for basic and advanced mathematical operations.

• Addition (+): Adds two numbers.

  let sum = 5 + 3; // sum is 8
  

• Subtraction (-): Subtracts one number from another.

  let difference = 10 - 4; // difference is 6
  

• Multiplication (*): Multiplies two numbers

  let product = 4 * 7; // product is 28
  

• Division (/): Divides one number by another.

  let quotient = 20 / 4; // quotient is 5
  

• Modulus (%): Returns the remainder of a division.

  let remainder = 15 % 4; // remainder is 3
  

• Exponentiation (*): Raises a number to the power of another number.

  let power = 2 ** 3; // power is 8
  

• Increment (++): Increases a variable's value by one.

  let counter = 0;
  counter++; // counter is now 1
  

• Decrement (-): Decreases a variable's value by one.

  let counter = 10;
  counter--; // counter is now 9
  

Comparison Operators

Comparison operators are used to compare two values. They return a boolean value (true or false) based on the comparison.

• Equal (==): Checks if two values are equal (with type coercion).

  console.log(5 == '5'); // true
  

• Strict Equal (===): Checks if two values are equal (without type coercion).

  console.log(5 === '5'); // false
  

• Not Equal (!=): Checks if two values are not equal (with type coercion).

  console.log(5 != '5'); // false
  

• Strict Not Equal (!==): Checks if two values are not equal (without type coercion).

  console.log(5 !== '5'); // true