JavaScript Operators

Variable values are often manipulated using various operators and functions. Below are some commonly used operators and functions:

Arithmetic operators

Used for mathematical calculations such as addition and subtraction, multiplication and division. For example, you can calculate the sum of two variables as follows:

var x = 5;
var y = 10;
var sum = x + y;

This calculates the sum of variables "x" and "y" and stores the result in a new variable named "sum".

Comparison operators

Used to compare two variables and give a true or false value depending on whether they are equal or smaller. For example, you can compare two variables as follows:

var x = 5;
var y = 10;
var comparison = x < y;

This compares whether the variable "x" is smaller than the variable "y", and stores the result in a new variable called "comparison".

String Concatenation

You can combine two strings using the plus operator. For example, you can combine two strings as follows:

var firstname = "Matt";
var lastname = "Meikäläinen";
var name = firstname + " " + lastname;

This connects two strings ("Matti" and "Meikäläinen") and adds a space between them. The result is saved in a new variable named "nimi".

Example

Here is an example of JavaScript code that uses various operators:

Practice