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Introduction to JavaScript

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  1. JavaScript: Basics
    9Topics
    |
    10 Quizzes
  2. JavaScript: Variables
    9Topics
    |
    10 Quizzes
  3. JavaScript: Conditional Statements
    10Topics
    |
    11 Quizzes
  4. JavaScript: Functions
    10Topics
    |
    11 Quizzes
  5. JavaScript: Scope
    6Topics
    |
    7 Quizzes
  6. JavaScript: Arrays
    11Topics
    |
    12 Quizzes
  7. JavaScript: Loops
    8Topics
    |
    9 Quizzes
  8. JavaScript: High Order Functions
    3Topics
    |
    4 Quizzes
  9. JavaScript: Iterators
    3Topics
    |
    3 Quizzes
Lesson 1, Topic 5
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JavaScript: Arithmetic Operators

Yasin Cakal 26 Oct 2021
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Basic arithmetic operations are commonly used in programming.

In our code, an operator is a character that performs a task. JavaScript includes various built-in arithmetic operators that allow us to do mathematical operations on integers. These include the following operators and their corresponding symbols:

  1. Add: +
  2. Subtract: -
  3. Multiply: *
  4. Divide:/
  5. Remainder: %

The first four execute as you may expect:

console.log(13 + 7); // Prints 20
console.log(9 - 1);  // Prints 8
console.log(9 * 2);  // Prints 10
console.log(12 / 3); // Prints 4

When we use console.log(), the computer will evaluate the expression within the parenthesis and print the result to the console. If we wanted to print the characters 13 and 7, we would enclose them in quotation marks and print them as a string.

console.log(12 % 5); // Prints 2
console.log(36 % 6); // Prints 0

The remainder operator, also known as modulo, returns the number that remains after dividing the right-hand number into the left-hand number as many times as it can evenly. Because 5 fits inside 12 two times, leaving 2 as the remainder, 12%5 = 2.

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