Data types and variables in C++ programming
This video lecture is all about data types and variables in c++ programming language.
Data types define the type of data a variable can hold, for example an integer variable can hold integer data, a character type variable can hold character data etc.
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Data types in C++ are categorised in three groups: Built-in, user-defined and Derived.
data types in c++
Built in data types
char: For characters. Size 1 byte.
char ch = 'A';
int: For integers. Size 2 bytes.
int num = 100;
float: For single precision floating point. Size 4 bytes.
float num = 123.78987;
double: For double precision floating point. Size 8 bytes.
double num = 10098.98899;
bool: For booleans, true or false.
bool b = true;
User-defined data types
We have three types of user-defined data types in C++
1. struct
2. union
3. enum
Derived data types in C++
We have three types of derived-defined data types in C++
1. Array
2. Function
3. Pointer
Variables are containers for storing data values.
In C++ there are different types of variables, for example:
String - stores text, such as "Hello".
int - stores integers (whole numbers), without decimals, such as 123 or -123
float - stores floating point numbers, with decimals, such as 19.99 or -19.99
char - stores single characters, such as 'a' or 'B'. Char values are surrounded by single quotes
bool - stores values with only two states: true or false
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