In computer science and computer programming, a data type is a grouping of data through which the compiler or interpreter can know how the developer expects to utilize the data. Most programming languages support various types of data, for example:
12 , 67.90, ‘c’, “hello!! Tom”
As a human being we can differentiate all values are different, but machine
can’t differentiate. So, we have to inform compiler which type data is
There are main 3 categories in
C++ Language :
1. Built in Types:
· void – valueless special purpose type which we will examine closely in
- int – integer: a whole number.
o i.e. 45,6789
· float – floating point value: a number with a fractional part.
o i.e. 56.89
- char – a single character.
Four types data there are:
a) small a to z
b) capital A to Z
c) 0 to 9 digit
d) other symbols like tab, space,*,>,?,$ etc.
i.e ‘x’, ‘c’, ‘1’,’*’,’#’ etc.
2. User Defined Types:
3. Derived Types:
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