Form data validation with PHP
This tutorial explains how to validate data that has been submitted by a user in a form. We will look at the following types of data validation: Check that a …
String length in PHP
This tutorial covers a few things about strings in PHP: the index of strings (each character has an index number) how to find the length of a string (how many …
IEEE754 32-bit floating point binary (single precision)
This video explains how to represent binary fractions using the IEEE754 32-bit floating point binary (single precision) standard.
Binary fractions – fixed point
This video explains fixed point representation of binary fractions.
Binary division
This video explains how to divide binary numbers.
Binary multiplication
This video explains how to multiply binary numbers.
Representing negative numbers in binary using 1s and 2s complement
This video explains how to represent negative numbers in binary.
Binary addition
This video explains how to add binary numbers together.
Treating text input from a form as an integer or float
If you have completed the User Input with Forms tutorial, you will now know how to ask the user for text input through a form, and use that input in …
How to convert between decimal and binary
This video explains how to easily convert a decimal number into binary, and how to also convert a binary number into decimal.
Variables and Data Types in JavaScript
In this second video from the beginners JavaScript tutorial series, you will learn how to create variables and work with strings, integers, and float data types in JavaScript. Variables are …
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 – …