Tag Archives: calculations

Operators

If you have created your own variables and assigned them each a value (such as a string or integer), then you will already be familiar with the assignment operator which is a single = (equals sign).

There are other operators used for calculations though such as adding, subtracting, multiplying, dividing, increasing and decreasing values, etc. Take a look at the source code to see what is available.

Make sure you also watch the video about operators here.

<!DOCTYPE html>
<html lang="en"
<head>
 <meta charset="utf-8"/>
 <title>JavaScript - Operators</title>
 <script type="text/javascript">
 var x = 5, y = 10; //variables can be initialised on one line, separated by commas
 var z = x + y; // this is how variables can be added
 
 z++ //this increases the z variable value by 1
 
 z-- //this decreases the z variable value by 1
 
 // operators include + (plus) - (minus) * (multiply) / (divide) and % (modulus) which returns the remainder from division
 
 x+=y; //this is an example of compound addition. It is the equivalent of x = x + y
 // variables can be added using the compound addition += , compound subtraction -= , compound multiplication *= or compound addition /=
 
 document.write(z); // now let's see what the z variable displays after these modifications.
 
 </script>
 
</head>
<body>
 
 
</body>
</html>

Operators in JavaScript

In this tutorial, you will learn how to use a range of operators in JavaScript to assign values, modify variables and make calculations.

If you have created your own variables and assigned them each a value (such as a string or integer), then you will already be familiar with the assignment operator which is a single = (equals sign).

Operators include:

Addition +
Subtraction
Division /
Multiplication *
Modulus %
Equals =

You can view the video below to see how to use these operators and scroll down to see the sample code.

 

The code below shows how you can use a range of operators when working variable assignments and calculations.

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="utf-8"/>
 <title>JavaScript - Operators</title>
 <script type="text/javascript">
 var x = 5, y = 10; //variables can be initialised on one line, separated by commas
 var z = x + y; // this is how variables can be added
 
 z++ //this increases the z variable value by 1
 
 z-- //this decreases the z variable value by 1
 
 // operators include + (plus) - (minus) * (multiply) / (divide) and % (modulus) which returns the remainder from division
 
 x+=y; //this is an example of compound addition. It is the equivalent of x = x + y
 // variables can be added using the compound addition += , compound subtraction -= , compound multiplication *= or compound addition /=
 
 document.write(z); // now let's see what the z variable displays after these modifications.
 
 </script>
 
</head>
<body>
 
 
</body>
</html>

Next tutorial: Strings

Numbers and Math in Python

This tutorial explains how to use numbers and math functions in Python. To do math in Python, you can use a range of arithmetic operators including:

  • + for addition
  • – for subtraction
  • * for multiplication
  • / for division
  • % for modulus
  • **2 for squared, **3 for cubed, and so on

For example 5*5 will return the value 25. As you can see, it is just like writing any math expression.

View the video below or click here to view it on YouTube.