Subsequent chapters will show you how to use different data types in different situations. For example, C and Java programming languages use int to specify integer data, whereas char specifies a character data type. Different programming languages use different keywords to specify different data types.
Similarly, when we write a computer program to process different types of data, we need to specify its type clearly otherwise the computer does not understand how different operations can be performed on that given data. This way, we realized that in our day-to-day life, we deal with different types of data such as strings, characters, whole numbers (integers), and decimal numbers (floating point numbers). Student sex has been represented by a single character which is 'F'. Student age has been represented by a whole number which is 13. Student section has been represented by a single character which is 'J'. Student class "6th" has been represented by a mix of whole number and a string of two characters. Student name "Zara Ali" is a sequence of characters which is also called a string. The first example dealt with whole numbers, the second example added two decimal numbers, whereas the third example is dealing with a mix of different data. Now, let's put one student record as per the given requirement − Here we would like to record the following information − Now let's take another example where we want to record student information in a notebook. Let's take another problem where we want to add two decimal numbers 10.50 & 20.50, which will be written as follows − Let’s keep Computer Programming aside for a while and take an easy example of adding two whole numbers 10 & 20, which can be done simply as follows −
It can be numeric, alphanumeric, decimal, etc. As its name indicates, a data type represents a type of the data which you can process using your computer program. Let's discuss about a very simple but very important concept available in almost all the programming languages which is called data types.
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