- JavaScript Tutorial
- JavaScript Advantages and Disadvantages
- Adding JavaScript to html
- External JavaScript JS File – Advantages, Disadvantages, Syntax, Attributes
- JavaScript Syntax
- JavaScript Statements
- JavaScript Output
- JavaScript Comments
- Javascript Data Types
- JavaScript Variables
- JavaScript Scope of Variables
- JavaScript Operators
- Javascript ternary operator
- Javascript typeof Operator
- Javascript Arithmetic Operators
- Javascript Assignment
- JavaScript Functions
- JavaScript Anonymous Functions
- JavaScript Callback Functions
- JavaScript Objects
- JavaScript Events
- JavaScript Strings
- JavaScript String Methods
- JavaScript Numbers
- JavaScript Number Methods
- JavaScript Math Object
- JavaScript Date
- JavaScript Date Formats
- JavaScript Date Methods
- JavaScript Arrays
- JavaScript Array Methods
- JavaScript Boolean
- JavaScript Comparisons
- JavaScript Conditions
- JavaScript Switch statement
- JavaScript For loop
- JavaScript while loop
- JavaScript Break and Continue
- JavaScript Type Conversion
- JavaScript Regular Expressions
- JavaScript Errors
- JavaScript Debugging
- JavaScript Conventions
- JavaScript Best Practices
- JavaScript Common Mistakes
- JavaScript Reserved Words
- JavaScript Performance
- JSON Data, format, mime type and parsing
- JavaScript Form Validation
- Forms API
- JavaScript Objects Definition
- JavaScript Object Properties
- JavaScript Object Methods
- JavaScript Object Prototypes
- JavaScript Window Object
- JavaScript Window Screen
- JavaScript Cookies
- JavaScript Location Object
- JavaScript History
- JavaScript Window Navigator
Javascript Assignment
Assignment operators are used to assign values to variables.
Operator Example Operation = Assign Equals to x = y += Addition Equals to x = x + y -= Subtraction Equals to x = x - y *= Multiplication Equals to x = x * y /= Division Equals to x = x / y %= Modulus Equals to x = x % y
Assignment
The equal (=) operator assigns a value to a variable.
<!DOCTYPE html>
<html>
<body>
<h1>The = Operator</h1>
<p id="demo"></p>
<script>
var x = 10;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>Download the code Run the code
Addition
The += operator adds value to variable. In below example, 5 is added to value of x. So it becomes 15.
<!DOCTYPE html>
<html>
<body>
<h1>The += Operator</h1>
<p id="demo"></p>
<script>
var x = 10;
x += 5;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>Download the code Run the code
Subtraction
The -= operator subtracts value from variable. In below example, 5 is subtracted from value of x. So it becomes 5.
<!DOCTYPE html>
<html>
<body>
<h1>The -= Operator</h1>
<p id="demo"></p>
<script>
var x = 10;
x -= 5;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>Download the code Run the code
Multiplication
The *= operator multiplies value of a variable. In below example, value of x is multiplied by 5. So it becomes 50.
<!DOCTYPE html>
<html>
<body>
<h1>The -= Operator</h1>
<p id="demo"></p>
<script>
var x = 10;
x *= 5;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>Download the code Run the code
Division
The /= operator divides a variable value. In below example, value of x is divided by 5. So it becomes 2.
<!DOCTYPE html>
<html>
<body>
<h1>The -= Operator</h1>
<p id="demo"></p>
<script>
var x = 10;
x /= 5;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>Download the code Run the code
Modulus
The %= operator divides a variable value and returns reminder. In below example, value of x is divided by 5 and its reminder is assigned to x.
<!DOCTYPE html>
<html>
<body>
<h1>The -= Operator</h1>
<p id="demo"></p>
<script>
var x = 10;
x %= 5;
document.getElementById("demo").innerHTML = x;
</script>
</body>
</html>Download the code Run the code