Will not explicitly create variables, we accept that they are created theįirst time when we use them. We don’t care much about syntax, right now. In this tutorial we aim to learn the concepts of computer int iNumber Creating a variable of type 'int' and name it 'iNumber'. It is easy – just write the type, followed by its name. We will talk about addresses when we get to pointers. It is automatically given by the computer. We can not use the value before we assign it. Don’t waste memory, but don’t worry if you still The size of the variable depends on the type of data that it keeps and sometimes on the value. What is a variable's size? If you remember from the last lesson, different data types take different amount of memory. If we want to assign a value from another type, first we This means the once a variable is declared, its data type cannot change. Languages like C, C++ and Java are 'type-safe'. Some languages allow the change of the data type of a variable. It is the type of data saved in our variable.

iNumberOfStudentsPassedTheMainTest : :-D. sStudent-Names : The dash “-“ is not allowed character. price - studentNames - customer_Name, sCustomerName, customer_name - MAX_VALUE – a constant. Here are examples of good names for variables:

If the name consists of several words, separate them with an underscore or start each word with an uppercase - Name constants in all UPPERCASE, separate words with an underscore. Good naming practices - The name has to be descriptive. There are exceptions like Pascal – it is not case In most of the languages it is case sensitive. It cannot be a (or reserved word) for the current language. 9 _ (this an underscore, not a dash/minus). They may vary forĭifferent languages, but we cover the most popular ones(C, C++, C#, There are strict rules when giving a name. We use it to assign a new value to it or to access the current value. Now that we know what is a variable, let's see how we can give it a name.

Whta is another word for variable.